Foreword:

What follows, is an attempt to catalog sources of map images for every one of the United States. The primary focus here, is to provide sufficient information to allow download and viewing of these images with OziExplorer. These images may or may not be viewable in other software. Questions relating to importation and viewing of these images with OziExplorer should be directed to:

U.S. (all 50 states)

http://datagateway.nrcs.usda.gov/

DRG 1:24K 1:100K 1:250K UTM NAD27. Collarless, standard resolution and filenames, full geotiff tags. Website erroneously claims these are in NAD83 datum. Download zipfile with .tif .tfw and .fgd files.

DOQQ B/W 1 meter/pixel UTM NAD83. Full county mosaics. MrSID and ECW formats. Download zipfile with .sid/.sdw or .ECW files.

Alabama

http://www.gsa.state.al.us/gsa/GIS/DATA.html

DRG 1:24k 1:100K 1:250K UTM NAD27 with no geotiff tags on most images. Standard resolution, standard filenames. Download in zipfile format with .tfw and .txt metadata file.

Alaska

http://agdc.usgs.gov/data/usgs/to_geo.html

DRG 1:25K 1:63,600 1:100K 1:250K UTM NAD27. Standard resolution and filenames. Full geotiff tags. Download in .gz format with .tfw, no .fgd metadata.

DLG 1:25K 1:63.6K all USGS standard layers, except hypsography (topo). Download in zipfile format. Must rename with .dlg extension after decompress from .gz. Convert to .mif format with DLG2MIFX.EXE for Ozi import.

DEM 1 degree (6 sec x 3 sec resolution), 15 min (3 sec x 2 sec resolution), 7.5 min (30 meter resolution) in USGS DEM format. Incomplete coverage for 30 meter DEMs. Download .gz file. Extract and rename with .DEM extension if necessary.

Arizona

http://aria.arizona.edu/search/index.html

Must register to download.

DRG 1:24K 1:100K 1:250K UTM NAD27 in .tif format. No .tfw file. FGDC file available. Full Geotiff tags. Use Geotiff Examiner or listgeo.exe (later version) to create .tfw if needed. Standard resolution and filenames. Download .tif and .fgd metadata files individually. Calibration accuracy appears slightly better without using .fgd on import.

DOQQ CIR and B/W UTM NAD83 quarter quad files at 1 meter/pixel resolution. Partial coverage for the state. No .tfw file. Full Geotiff tags. Standard filenames. Grey-scale DOQQs for some areas at 1 meter/pixel. Color images are ~154megabytes b/w ~47megabytes. Download .tif file.

DEM 1:24K 30 meter. Download .dem file.

Arkansas

http://www.cast.uark.edu/cast/geostor/raw_DOQ/

DRG 1:24K 1:100K 1:250K UTM NAD27 standard resolutions, non-standard filenames. Full geotiff tags. .tfw files available. No FGDC file. Download .tif and .tfw files individually. No zip or .gz file.

DOQQ CIR color and b/w UTM NAD83 1 meter/pixel resolution circa 2000-2002. MrSid format at 20:1 or 5:1 compression with .sdw file. Download MrSID with .sdw file individually. No .zip or .gz file.

California

http://casil.ucdavis.edu/casil/

DRG 1:24K 1:100K 1:250K Teale Albers projection NAD27, 400dpi (~1.5 meterspixel) NAD27. 1:24K DRGs are available tiled to the coverage of a 1:100k (32 tiles = 30 x 60 min) map in MrSid Format with .sdw file. These are extremely large files, with some as large as 100megabytes. No zipfile or .gz. More conventional DRGs in collared and collarless format. Nearly complete geotiff tags with .tfw, but no .fgd. Missing "GeographicTypeGeoKey (Short,1): GCS_NAD27" geotiff tag on collarless. Standard filenames. Download .tif with .tfw individually, or .sid with .sdw.

DOQQ CIR and B/W in 1 meter/pixel UTM NAD83. USGS standard DOQQ (3.75 x 3.75 min). CIR images are ~145megabytes, B/W ~45megabytes. No zipfile or .gz. Download .tif .tfw .xml (metadata) .txt (header). Standard filenames, full geotiff tags. Incomplete coverage for the state.

http://bard.wr.usgs.gov/ (S.F. Bay Area)

DRG 1:24K 1:100K NAD27. 1:24K DRGs are in Albers projection NAD27 at 400dpi (~1.5 meters/pixel) with minimal geotiff tags, standard filenames. 1:100K are in UTM NAD27 at standard resolution, no geotiff tags and non-standard filenames. Download in .gz format and .tfw separately.

DEM 1:24K 30 meter and 10 meter grid UTM NAD27. No zipfile or .gz on 30 meter data. 10 meter grid in .gz file.

DLG 1:24k 1:100K many layers hypso, hydro, roads, PLSS, etc. Download in .e00 or .e00.z format for 1:100K and DLG-O for 1:24K (convert to .mif with DLG2MIFX.EXE).

DOQQ in 1 meter/pixel B/W NAD83 UTM. These are actually .jpg files with .jgw file. Rename .coq to .jpg for import.

http://tahoe.usgs.gov/ (Lake Tahoe Area)

DRG 1:24K mosaic of 18 7.5 x 7.5 min tiles covering the entire Lake Tahoe region. Tiles were reprojected to UTM zone 10 NAD27 as needed. Download zipfile in geotiff (82 megabytes) or MrSid (57 megabytes) format, with .tfw or .sdw file.

DOQQ 1 meter/pixel mosaic of entire Lake Tahoe region in common UTM NAD27 zone 10 projection. Download zipfile with MrSID (~123megabyte) image and .sdw file. UTM NAD27 zone 10.

Colorado

http://water.state.co.us/pubs/drg.asp

DRG 1:24K UTM NAD83 collarless. Full coverage for the state. Standard resolution, semi-standard USGS filenames with minimal geotiff tags. Downloadable only as full 2 x 1, or 1 x 1 degree blocks, with 128 or 64 DRGs and .tfw files per zipfile. Extremely large files.

http://mountain-prairie.fws.gov/gisdata/Colorado/Data_Not_Assoc_With_NWR/DRGs/

DRG 1:24K UTM NAD27. Coverage for many parts of Colorado, but not complete. Standard USGS filenames with full geotiff tags. Download zipfile with .tif .tfw .fgd files.

http://www.mountainstudies.org/DataBank/GIS/default.htm

DRG 1:24K 1:100K UTM NAD27. Coverage for the San Juan Mountains (near 4 corners) only. .tif with .tfw, full geotiff tags. Standard filenames and resolutions. Download zipfile.

DEM 1:24K 30 meter grid, with some areas of 10 meter grid for the San Juan Mountains. USGS SDTS NAD27 UTM. Convert with SDTS2DEM.exe for Ozi. Download zipfile.

Connecticut

http://magic.lib.uconn.edu/cgi-bin/MAGIC_DBsearch1.pl

DRG 1:24K 1:25K 1:100K 1:250K some 15 x 7.5 min quads. State Plane SPCS27 (not 83!) NAD27. With and without collars. No geotiff tags. .tfw file is in units of feet. Download in zipfile format with .tif .tfw .doc etc. Non-standard filenames, standard resolution.

DOQQ B/W 1 meter/pixel, State Plane SPCS83 NAD83, MrSid format with .sdw in units of feet. Jpeg format with hdr and metadata, but no .jgw (create from .txt). UTM NAD83 and NAD27. Artifacts visible at 1.5x zoom for both .jpg and .sid. Non-standard filenames.

DEM 1:24K 30 meter grid in USGS DEM format. UTM NAD27.

DLG various in .e00 and .mif format.

Delaware

http://www.rdms.udel.edu/drgdlg/

DRG 1:24k 1:100k 1:250k UTM projection, standard resolutions. .tif .tfw and .cns (metadata) files come in 1 zip file. NAD83 geotiff tags and .tfw file. Calibration error of ~1.6 arc-seconds longitude in sample.

DLG 1:24K UTM NAD27. Most layers including hypsography (topo contours).

District of Columbia

http://www.radford.edu/~geoserve/DistrictofColumbia.html

DRG 1:24K UTM NAD27. Standard resolution and filename. Just one quad covers most of the district (see neighboring states). Full geotiff tags/keys. Download zipfile with .tif and .tfw files.

Florida

http://www.labins.org/drg.htm

DRG 1:24k 1:100k 1:250k DRG NAD27 UTM standard resolutions and filenames. .tif .tfw and fgdc files not zipped or gz'd. No geotiff tags! Sample 24K DRG image was very grainy. As a result, packbits compressed tif was 27megabytes.

DOQQ CIR and b/w UTM NAD83, Florida Albers and State Plane SPCS83

MrSID, Jpeg and tiff formats with .tfw .sdw .jgw files. Resolutions 1, 3 and 6 meters/pixel. State Plane .sdw .tfw .jgw files are in units of feet.

DLG 1:24K Hydro, Roads, etc (no hypso topo contours) UTM NAD27 DLG format only, no SDTS. Convert to .shp or .mif for Ozi import.

DEM 30 meter SDTS format.

http://map.fgdl.org/download/

DRG 1:24K Florida Albers projection HARN (NAD83). Collarless with non-standard filenames. In tif format with full geotiff tags and no .tfw (create with geotiffexamine), or MrSID format with .sdw in units of meters (miracle!). Tif is at substandard 4 meters/pixel, while MrSID is at 2 meters/pixel.

DOQQ 2 meters/pixel B/W MrSID image with .sdw file. Florida Albers projection NAD83. These are very small coverages ~1/16 of a 1:24K quad. Non-standard filenames. Rare example of restraint exercised in MrSID compression ratio.

Georgia

http://csat.er.usgs.gov/drg/drg.html

http://csat.er.usgs.gov/statewide/downloads.html

DRG 1:24K 1:100K 1:250K UTM NAD27 standard resolutions and filenames. Full geotiff tags. Download .tif .tfw and metadata .txt files download in one .zip file.

DLG 1:250K DEM 1:100K various formats

http://gis1.state.ga.us/index.asp

DRG 1:24K 1:100K 1:250K UTM NAD83 collarless. No geotiff tags. Download zipfile with .tif and .tfw.

Idaho

http://gis.idl.state.id.us/GIShtm/static/GisProgram.htm

http://inside.uidaho.edu/asp/geodata.asp?Page=1&Category=Theme&SubCategory=Imagery%20%26%20Basemaps

DRG 1:24K 1:100K 1:250K with or without collars. UTM NAD27 projection and some Idaho Transverse Mercator (not State Plane). Standard resolutions. Coverage is not complete for the whole state. Download in zipfile or .tgz format with .tif and .tfw. Non-standard filenames. No other metadata. Collared DRGs appear to be USGS original DRGs and have full geotiff tags Non-collared clipped DRGs and non-UTM DRGs have minimal geotiff tags.

DOQQ 1 meter/pixel B/W UTM NAD27 projection. Download zipfile with MrSID image and .sdw file. MrSID images are excessively compressed and show significant artifacts at only 2x zoom. Non-standard filenames.

DEM level 2 and E00 DLGs hydro, roads etc (no topo contours).

Illinois

http://www.isgs.uiuc.edu/nsdihome/ISGSindex.html

DRG 1:24K 1:100K 1:250K UTM and Lambert Conformal Conic projections. Standard resolutions. Available in collared and collar-clipped versions. Geotiff tags on Lambert projected DRGs are erroneous. UTM geotiff tags ok. Download zipfile with .tif, .tfw, .fgd files.

DOQQ 1 meter/pixel resolution B/W USGS standard UTM NAD83 projection. Download zipfile with MrSID image and .sdw file.

DOQQ 1 meter/pixel resolution B/W USGS standard UTM NAD83 projection. Partial state coverage (Des Plaines Watershed) DOQQ 1 ft/pixel B/W State Plane SPCS83 projection. .SDW file is in units of feet.

Indiana

http://www.indiana.edu/~gisdata/doqdl/map/m10000.html

http://pasture.ecn.purdue.edu/~caagis/wellhead/imap4/

http://atlas.ulib.iupui.edu/msa/msa.html (central Indiana only)

DRG 1:24K 1:100K 1:250K UTM NAD27. Collarless, standard resolutions and filenames. Download in .tgz format with .tfw for NAD27 and NAD83 and metadata .fgd. Rare full geotiff tags in collarless. NAD27 geotiff will conflict with NAD83 .tfw.

DOQQ 1 meter/pixel resolution B/W in .bil and MrSID format, with .hdr and .sdw file. UTM NAD83, non-standard filenames. MrSID files overcompressed with visible artifacts at 2x zoom.

Iowa

http://ortho.gis.iastate.edu/

http://komodo.gis.iastate.edu/new_site/

DRG 1:24K 1:100K UTM NAD83. Custom user defined area, then download in .tif .jpg .gif formats. Collarless. Limited to 10megabytes estimated raw image, before compression (hack link for larger). Download .tfw .jgw .gfw files. Max resolution is 2.43 meters/pixel. Full geotiff tags on .tif. Non-standard filenames.

DOQQ UTM NAD83. B/W and CIR, Custom user defined area, then download in .tif .jpg .gif formats. Limited to 10megabytes estimated raw image, before compression (hack link for larger). Download .tfw .jgw .gfw files. Max resolution is 2 meters/pixel (hack). Full geotiff tags on .tif.

http://www.igsb.uiowa.edu/nrgis/quads/iaquads.asp

DRG 1:24K UTM NAD27 w/wout collars. Standard resolutions. Download individual .tif and .tfw worldfile. Full geotiff tags on collared. Non-standard filenames.

Kansas

http://gisdasc.kgs.ukans.edu/kgcc/catalog/coredata.cfm

DRG 1:24K 1:100K 1:250K w/wout collars. UTM NAD27 and NAD83. Lambert Conformal Conic w/o collars. Full county mosaics also available. Standard resolutions. Download in zipfile with .tif and .tfw. FGDC file and full geotiff tags on USGS original NAD27 UTM with collars only. Non-standard filenames. All .tfw files are in units of meters.

DOQQ 1 meter/pixel MrSID with .sdw format. Download in zipfile UTM NAD83 or NAD27, by county (extremely large files) or by 24K quad. Overcompressed with significant visible artifacts at 2x zoom.

DLG 1:24k 1:100K hypsography (topo contours) and others, UTM NAD27 USGS DLG format 5ft contour intervals (convert to mif with DLG2MIFX.EXE) and .e00 format in Lambert Conformal Conic projection. Download in zipfile.

DEM 1:24K 30 meter grid in USGS format. Download in zipfile format.

Kentucky

http://kymartian.state.ky.us/

http://ogi.ky.gov/data/content.htm

DRG 1:24K 1:100K 1:250K NAD83 State Plane SPCS83 N/S and Kentucky single zone. Standard resolution for N/S state plane, 2 meters/pixel for single zone. Collarless with non-standard filenames. Partial geotiff tags, but units are feet. No .tfw file on N/S state plane (ftp north_tfw.tar or south_tfw.tar). Download in zipfile or .gz format.

DOQQ 1 meter/pixel B/W .jpg format with .jgw in units of feet. State Plane SPCS83 NAD83 and Kentucky single zone. These are small images, 1/16 of a full quad.

DEM 1:24K 30 foot grid, in Kentucky single zone projection, NAD83.

Louisiana

http://atlas.lsu.edu/rasterdown.htm

DRG 1:24K 1:100K 1:250K UTM NAD83, collarless. Standard resolution and filenames. Download in zipfile format. No .tfw file. Geotiff is using "model transformation" tag (Ozi incompatible) instead of simpler "model tiepoint tag". Create .tfw with listgeo -tfw option (newer version only).

DOQQ 1 meter/pixel CIR NAD83 UTM. Download in zipfile format with .sdw and a slew of other info files. Artifacts OK at 2x zoom. Pseudo-standard filenames.

DEM 1:24K 30 meter grid in UTM NAD83. Download in zipfile format.

Maine

http://musashi.ogis.state.me.us/catalog/catalog.asp

http://apollo.ogis.state.me.us/catalog/catalog.asp

DRG 1:24K UTM NAD83, collarless. Download in zipfile format with .tfw. All .tif files have the same name "DRGCLIP.TIF". Rare, full geotiff tags in collarless DRG.

DOQQ 1 meter/pixel B/W UTM NAD83. Download zipfile with MrSID and .sdw files. All .sid files have the same name "MEDOQ.SID".

DEM 1:24K 30 meter grid. UTM NAD83, .e00 format. Download zipfile. All DEM files have same name "MEDEM30.E00".

DLG 1:24K Partial for state. Roads etc, in shapefile format. Download zipfile. All shapefiles have same name.

Maryland

http://www.radford.edu/~geoserve/Maryland.html

DRG 1:24k UTM NAD27. Standard resolution and filenames. Download zipfile with .tif and .tfw file. Full geotiff tags. One sample had 6.7 arc-second latitude georeference error, second sample was ok. Ymmv.

http://www.radford.edu/~geoserve/Maryland.html

DOQQ 4 meter/pixel CIR NAD83 State Plane SPCS83. In tif format with .tfw. No geotiff tags. Rare units of meters in a state plane .tfw file (no conversion neeeded). Download zipfile.

Massachusetts

http://www.state.ma.us/mgis/download.htm

DRG 1:24K State Plane SPCS83 NAD83. 4 Kilometer square tiles. No geotiff tags. Download zipfile with .tif, .tfw. Standard resolution, non-standard filenames.

DOQQ B/W 1.0 2.0 5.0 meters/pixel 4 kilometer square tiles, State Plane SPCS83 in .tif format with .tfw. 0.5 and 1 meter/pixel B/W and CIR in MrSID format with .sdw file. Non-standard filenames. Download .sid .sdw or .tif .tfw separately. Non-standard filenames. No geotiff tags on .tif files, except minimal on USGS files.

DLG various layers in shapefile and .e00 format.

Michigan

http://www.mcgi.state.mi.us/mgdl/?rel=ext&on=cext

http://www.michigan.gov/dnr/0,1607,7-153-10371_14546---,00.html

DRG 1:24K 1:100K 1:250K Michigan GeoRef projection (oblique mercator) collarless, clipped to county boundaries. Partial geotiff tags. Download self extracting .exe with .tif .tfw and .htm metadata. Must reproject to somthing sane. Standard resolution, non-standard filenames. Large files.

DOQQ 1 meter/pixel CIR Michigan GeoRef projection (oblique mercator). Download self extracting .exe with MrSID and .sdw files. Coverage is USGS standard 3.75 x 3.75 min quarter-quad. Non-standard filenames. Must reproject for Ozi.

DEM 1:24K 30 meter grid in .e00 format and rare geotiff. Michigan GeoRef projection (oblique mercator). Download in self extracting .exe.

DLG 1:100K all layers by county, in shapefile format, Michigan Georef projection. Download in self extracting .exe form.

Minnesota

http://deli.dnr.state.mn.us/

DRG 1:24K 1:100K 1:250K UTM extended zone 15 NAD83, collarless. Geotiff info has "wrong data type 2 for "GeoKeyDirectory" error, but still imports ok. No .tfw file (create with geotiffexamine or listgeo). Download .tif in zipfile. Standard resolution, non-standard filenames.

DOQQ 3 meter/pixel B/W, UTM extended zone 15 NAD83. Full 7.5 x 7.5 min quad. Geotiff error same as DRGs. Download .tif in zipfile. No .tfw. non-standard filenames.

DEM 1:24K 30 meter grid in .e00 format. UTM extended zone 15 NAD83. Download zipfile.

DLG unknown coverage, many layers.

Mississippi

http://www.maris.state.ms.us/HTM/Data%20Warehouse/Download%20Data.htm

DRG 1:24K NAD83 Mississippi Transverse Mercator Projection. Collarless. MrSID format with .sdw file. Standard resolution and filenames. FTP download .sid .sdw files individually. No other metadata. Also full county mosaics available.

DOQQ B/W and CIR 1 meter/pixel NAD83 Mississippi Transverse Mercator Projection. MrSID format with .sdw file. Minimal artifacts at 2x zoom. FTP download .sid .sdw files. Full county mosaics also available in 3 meter/pixel resolution.

DEM county wide coverage at 10 meter grid. Mississippi Transverse Mercator Projection NAD83. .e00 format. Download in tar.z format or self extracting .exe. Decompressed file is extremely large (~200 megabytes). Need to convert to USGS DEM format for Ozi.

DLG countywide coverage with all layers. NAD83 in lat/lon, Mississippi Transverse Mercator Projection and State Plane SPCS83, shapefile format. Download in self extracting zip, or .tar.z file.

Missouri

http://msdisweb.missouri.edu/data/drg/index.htm

http://msdisweb.missouri.edu/data/datasetlist.htm

DRG 1:24K 1:100K 1:250K UTM. Standard resolutions and filenames. Full geotiff tags with NAD27 datum, but .tfw is in NAD83. Download in .tar.gz format includes standard .fgd metadata file.

ftp://www.icrest.missouri.edu/mrsid/doqq/

DOQ 1 meter/pixel B/W MrSID format with .sdw file NAD83. Download in .tar.gz format. The most egregious example of MrSID overcompression abuse seen to date. Gross artifacts visible at 1X. Download full quad or mosaic'd county area (extremely large files).

DEM 1:24K 30 meter grid in .eoo format (need conversion for Ozi). UTM NAD83. Download in .tar.gz format.

Montana

http://nris.state.mt.us/nsdi/drg.html

DRG 1:24K 1:100K 1:250K UTM and State Plane SPCS 83. UTM is standard USGS NAD27 DRG with standard filenames, resolution, full geotiff tags, with fgd metadata. State Plane is SPCS 83 (NAD83) with clipped collars, minimal geotiff tags. Download in zipfile format with .tif .tfw and .fgd files. Also 50x35 mile MrSid format in SPCS 83 with .sdw file. Use Montana SP2500 projection type on import for State Plane files.

http://nris.state.mt.us/nsdi/doq.asp

DOQQ 1 meter/pixel B/W MrSID with .sdw in State Plane SPCS83, or NAD27 UTM. Download individual .sid, .tif and .sdw, .tfw. Minimal geotiff tags on .tif files. Use Montana SP2500 projection on import for State Plane files.

DEM 1K 100 and 30 meter grid in DTED USGS DEM or gridascii format for the whole state. UTM NAD83 and State Plane SPCS83 formats. Download .zipfile.

DLG 1:100K for almost everything, except hypsography (topo contours).

Nebraska

http://csd.unl.edu/drgs/drg.asp

DRG 1:24K 1:100K 1:250K. Standard resolution USGS DRGs with full geotiff tags, .tfw and .fgd files. Download each file separately. Non-standard filenames.

http://www.dnr.state.ne.us/databank/coq.html

COQ (compressed ortho quad) .jpg images. 1 meter/pixel B/W NAD83 UTM and State Plane SPCS83 . Download .jpg and .jgw worldfile. Non-standard filenames.

Nevada

http://keck.library.unr.edu/

DRG 1:24K 1:100K 1:250K. Standard resolution USGS DRGs with standard filenames. UTM NAD27 with no geotiff tags. Download zipfile with .tif .tfw .fgd .xml etc. Sample image was very grainy, resulting in large filesize of ~19megabytes. Some california DRGs in standard USGS UTM NAD27 available for border areas.

DEM 1:24K 30 meter grid in USGS DEM format UTM NAD27. Download zipfile.

DOQQ 1 meter/pixel B/W in Standard USGS full geotiff format UTM NAD83. Download individual .tif and .hdr files. No .tfw files (create with geotiffexamine). Tiff files are not compressed at all. ~47megabytes per DOQQ.

New Hampshire

http://www.granit.sr.unh.edu/cgi-bin/load_file?PATH=/data

DRG 1:24K NAD83 State Plane SPCS83, minimal geotiff tags, standard resolution, non-standard filenames, collarless. Download in zipfile format that is incompatible with XP built-in zip decompressor. .tfw file and geotiff tags are in units of feet. Sloppy collarless trim.

DOQ 1 meter/pixel B/W State Plane SPCS83, MrSID format with .sdw file in units of feet. Download in zipfile format that is incompatible with XP built-in zip decompressor. Sloppy trim.

DEM 1:24K USGS 30 meter grid DEM format NAD83, State Plane SPCS83. Download in zipfile format that is incompatible with XP built-in zip decompressor.

DLG 1:24K various layers NAD83 State Plane SPCS83.

New Jersey

http://www.state.nj.us/dep/njgs/geodata/dgs99-1.htm

DRG 1:24K (B/w) 1:100K (color) NAD83 State Plane SPCS83. Partial geotiff tags. 1:100K county mosaics at half resolution. 1:24K at standard resolution, collarless. Non-standard filenames. Download zipfile with .tif and .tfw. Geotiff and .tfw in units of feet.

http://njgeodata4.state.nj.us/i-map/iw/

DOQQ 1 meter/pixel CIR (B/W?) NAD83 State Plane SPCS83. Standard quarter quad coverage. Non-standard filenames. MrSID and .jpg format with .sdw, .jgw file in units of feet. Download zipfile.

http://www.state.nj.us/dep/gis/download.htm

DEM 10 meter grid spacing. Arc/Info ascii grid, State Plane SPCS83. Coverage is for large "watershed" zones. Download zipfile.

DLG various layers in shapefile format. Download zipfile.

New Mexico

http://sar.lanl.gov/index.html

http://rgis.unm.edu/data_entry.cfm

DRG 1:24K 1:100K 1:250K. Standard resolution USGS DRGs with standard filenames. UTM NAD27 with full geotiff tags. Download as .tif or in .zip .gz .bz2. No .fgd or .tfw files.

DOQQ 1 meter/pixel B/W UTM NAD83. Semi-standard filenames. Standard quarter quad coverage. MrSID format with .sdw file. Download zipfile. Moderate artifacts at 2x zoom.

DEM 10 meter and 2 arc-second grid USGS DEM format UTM NAD27. Download zipfile.

DLG 100K various layers in shapefile and .e00 format. Download zipfile.

New York

http://www.nysgis.state.ny.us/gisdata/

DRG 1:24K 1:100K 1:250K. UTM NAD83 high resolution ~1.2 meter/pixel raster topo contours and roads as two separate raster files. Topo contours ideal for raster to vector conversion. Download in zipfile format including .tfw and .tab files. Full geotiff tags. Standard resolution traditional DRGs available in UTM NAD 27. Standard USGS filenames. Full geotiff tags with .tfw and .tab file. Download in zipfile format. Many quads in sensitive areas, are not available due to security measures.

DEM 1:24K 10 meter grid. Link from the DRG download page under "other coverages" to the Cornell site. USGS standard DEM format. Download .gz file in UTM NAD27.

DOQQ 1 meter/pixel CIR and B/W UTM NAD83 in MrSID format with .sdw and .tab file. No zipfile or .gz. These cover 1/4 of a standard DOQQ. Moderate artifacts at 2x zoom. 1 ft and 2 ft /pixel natural color and B/W images in State Plane SPCS83 NAD83. Download MrSID file with .sdw in units of feet. These are very small coverages, less than 1/16 of a standard DOQQ.

http://www.mit.edu/afs/sipb/contrib/usgs-data/

DRG 1:24K 1:25K 1:250K. UTM NAD27 standard resolution USGS DRGs with standard filenames. Appears to be full state coverage. Full geotiff tags, but files have been compressed with "deflate" compression (Ozi incompatible). Convert back to packbits compression with Gimp or IrfanView. Download .tif .tfw .fgd files separately.

North Carolina

http://207.4.62.65/GISftp/Default.asp?directory=%5CDOTUSGSMosaic

DRG 1:24K NAD83 SPCS83 State Plane. Full county mosaics. Very large files in MrSID format. Download .sid and .sdw files.

http://207.4.62.65/GISftp/Default.asp?directory=%5CDOTAerialMosaic

DOQQ 1 meter/pixel B/W in MrSID format with .sdw file. NAD83 State Plane SPCS83. Mosaic by county, extremely large files 50 - 250 megabytes. MrSID files overcompressed. Download .sid and .sdw files.

http://www.radford.edu/~geoserve/NorthCarolina.html

DRG 1:24k UTM NAD27. Standard resolution and filenames. Download zipfile with .tif and .tfw file. Full geotiff tags. Coverage is only for border areas.

http://cwt33.ecology.uga.edu/gis_drgs.php

DRG 1:24K UTM NAD27. Non-standard resolution (3 meters/pixel) in Erdas Imagine format, pseudo-standard filenames. Download self-extracting zipfile with .img file. Convert to geotiff with Erdas Viewfinder. Coverage for western part of state only.

http://cwt33.ecology.uga.edu/gis/doqs_24k_coweeta_block.html

DOQQ 1 meter/pixel B/W in MrSID format with .sdw file. NAD83 UTM, semi-standard filenames. Download self-extracting zipfile with .sid and .sdw. Coverage for western part of state only.

http://lnweb02.co.wake.nc.us/gis/gismaps.nsf

Wake County
DOQQ 0.5 foot/pixel B/W and 1 foot/pixel CIR in MrSID format with .sdw file in units of feet. NAD83 State Plane SPCS83. 2500 x 2500 foot squares. Download .sid and .sdw files.

http://204.168.68.180/mainpage.cfm?category_level_id=420&content_id=361

Johnston County
DOQQ 10 foot/pixel B/W in .tif format with .tfw in units of feet. No geotiff tags. NAD83 State Plane SPCS83, 10k x 10k foot squares. Download zipfile.

http://www.co.guilford.nc.us/government/infoservices/GISwebpage/File_Trans/download_data.htm

Guilford County
DOQQ B/W 1 foot/pixel resolution, .sid without .sdw. Use MrSID_info.exe or MrSID Geoviewer to extract/create .sdw file in units of feet. NAD83 State Plane SPCS83. 5K x 5k foot squares.

http://www.cityofws.org/gis/html/aerials___planimetrics___topog.asp

Forsyth County
DOQQ CIR 1 foot/pixel resolution in .sid format with .sdw in units of feet. NAD83 State Plane SPCS83 6k x 4k foot tiles. Download in zipfile format.

North Dakota

http://www.state.nd.us/ndgs/gisinfo/datawearhouse_h.htm

DRG 1:24K 1:100K UTM NAD27. Standard USGS product resolution, filename, etc. Full geotiff with .tfw, but no .fgd. Download zipfile.

DEM 1:24K 10 and 30 meter grid USGS DEM format. UTM NAD27. Download zipfile.

DLG 1:24K hydro and hypso layers, 1:100K roads, hydro and hypso (topo contour) layers. UTM NAD27. Download zipfile.

DOQQ 1 meter/pixel B/W USGS DOQQ UTM NAD83. BSQ format with .hdr file. Convert to .tif with Erdas Viewfinder. Download zipfile.

Ohio

ftp://ftp.geodata.gis.state.oh.us/geodata/

DRG 1:24K NAD27 UTM. Standard resolution, non-standard filenames in .tif format with .tfw file, no .fgd file. Full geotiff tags. Download zipfile.

DLG 1:24K NAD27 UTM. All layers including topo contours. Download zipfile with .dlg file. Convert to .mif with DLG2MIFX.EXE for Ozi import.

DEM 1:24K 30 meter grid, UTM NAD27. Non-standard filenames. Download zipfile.

DOQQ 1 meter/pixel B/W UTM NAD83 and State Plane SPCS83 in MrSID format with .sdw. State Plane .sdw files are in units of feet. Modest artifacts at 2x zoom. Non-standard filenames. Download in zip format with .sid, .sdw, .txt, .xml files.

Oklahoma

http://geo.ou.edu/cgi-bin/redesign.cgi?ft=db&template=DataImageMap.htm

DRG 1:24K 1:100K 1:250K NAD27 UTM or NAD83 Albers equal area. Standard resolution, standard filenames and full geotiff tags on UTM. Download .tif and .tfw file.

DOQQ 1 meter/pixel NAD83 UTM and Albers. Full 7.5 x 7.5 min quad in MrSID format with .sdw. Quarter quad in .bil format with .hdr and MrSID with .sdw. Convert .bil file to .tif, with Erdas Viewfinder. Semi-standard filenames. Download individual or zipfile.

DEM 1:24K 30 meter grid, UTM NAD27. Non-standard filenames. Download USGS standard .dem file.

Oregon

http://www.or.blm.gov/gis/resources/dataset.asp?cid=101

DRG 1:24K Standard resolution, 60 min x 30 min mosaic in MrSID format. UTM NAD27. Download in zipfile with .sdw file. Very large files.

http://www.or.blm.gov/gis/resources/dataset.asp?cid=102

DEM 1:24K 10 meter grid in USGS DEM format merged to 1 degree x 1 degree block. Download in zipfile format. Very large files.

http://libweb.uoregon.edu/map/map_section/map_librarydata.html

DRG 1:24K Coverage for only 14 counties. Standard resolution and filenames. Website claims Oregon Lambert, but is actually UTM NAD27. Full geotiff with .tfw. Download in zipfile.

DOQQ 1 meter/pixel B/W MrSID format with .sdw file. Oregon Lambert projection NAD83. Visible artifacts at 1x. Non-standard filenames. Coverage for 14 counties only. Download in zipfile with .sid and .sdw file in units of feet.

DEM 1:24K USGS .dem format 10 meter grid. UTM NAD27. Coverage for 14 counties only. Download in zipfile.

http://www.gis.state.or.us/data/alphalist.html

DRG 1:24K 1:100K 1:250K Standard resolution collarless, minimal geotiff tags, semi-standard filenames. Oregon Lambert projection NAD83. Download zipfile with .tif and .tfw in units of feet.

DOQ 1 meter/pixel B/W MrSID format with .sdw file. Oregon Lambert projection NAD83. 7.5 x 7.5 min coverage (full quad). Semi-standard filenames. Download .sid and .sdw files separately. .sdw file is in units of feet.

DEM 1:24K 30 meter grid USGS DEM format UTM NAD27. Download in zipfile format. Extracted file is missing .dem extension.

Pennsylvania

http://www.pasda.psu.edu/access/

ftp://pasda.cac.psu.edu/pub/pasda/

DRG 1:24K Standard resolution UTM NAD27, full geotiff tags, standard filenames. Download in zipfile with .tfw .xml etc. No .fgd file.

DOQQ 1 meter/pixel B/W UTM NAD83 in tif format with full geotiff tags and .tfw file. Download in zipfile with .tfw .xml etc. Non-standard filenames. Complete state coverage circa 1993-1995. Partial coverage 1999.

DEM 1:24K USGS DEM format 30 meter grid. NAD27 UTM. Download in zipfile. Non-standard filenames.

Rhode Island

http://www.edc.uri.edu/rigis-spf/rigis.html

DRG 1:24K State Plane SPCS83, collared or clipped. Standard resolution, non-standard filenames. Minimal geotiff tags. Download zipfile with .tif and .tfw in units of feet. Sample file was not accurately clipped or registered (~10 meters out).

DEM 1:24K 30 meter grid, NAD83 State Plane SPCS83. Download zipfile.

http://ortho.edc.uri.edu/

DOQQ 1 meter/pixel (1995) and 1 foot/pixel (1997) State Plane SPCS83. Available in .tif geotiff and .jpg (recommended). Full geotiff tags. .jgw .tfw and geotiff tags are in units of feet. Use geotiffexamine to fix geotiff tags. Download .tif or .jpg with .tfw or .jgw files. MIT ortho server limits 10 megabyte images on 1995 data (hack link), but no limit on 1997 data.

South Carolina

ftp://water.dnr.state.sc.us/pub/gisdata/

http://www.dnr.state.sc.us/gisdata/index.html

DRG 1:24K NAD27 UTM, collarless. In .tif and MrSID format with .tfw or .sdw. .tif file has minimal geotiff tags and is compressed with LZW (convert to packbits). Standard resolution, non-standard filenames.

DOQQ 1 meter/pixel CIR NAD83 UTM in MrSID format with .sdw file. Excellent restrained MrSID compression. Download .sid and .sdw files.

DEM 1:24K 30 meter grid NAD27 UTM USGS .dem format. Non-standard filenames. Download .dem file.

DLG 1:24K many different layers including hypsography (topo contours) NAD27 UTM. Download .e00 format file.

South Dakota

http://www.sdgs.usd.edu/register/index.html

DRG 1:24K NAD83 UTM, collarless. In .tif format with .tfw. Minimal geotiff tags. Standard resolution, semi-standard filenames. Download zipfile.

DOQQ 1 meter/pixel B/W UTM NAD83 in MrSID format with .sdw file and .hd header file. Moderate artifacts at 2x zoom. Download zipfile containing 4 quarter quads covering full quad area.

DEM 1:24K NAD83 UTM, 30 meter grid in ArcInfo binary grid format. Must convert for Ozi (how?). Download zipfile containing 1 x 1 degree block with 64 quads of data in individual directories for each quad.

DLG 1:24K 1:100K NAD83 Lat/Lon in shapefile format. Various layers (roads, hypso, etc). Download zipfile with all layers.

Tennessee

http://www.tngis.org/

DRG 1:24K NAD83 State Plane SPCS83, collarless. In .tif format with .tfw in units of feet, no geotiff tags. Standard resolution and filenames. Download zipfile. Also by county in NAD27 UTM (very large files).

DOQQ 1 meter/pixel B/W UTM NAD83 in MrSID format with .sdw file. Significant artifacts at 2x zoom. Download .sid and .sdw files.

DEM 1:24K NAD27 UTM, 10 meter grid in USGS .dem format, 30 meter grid in ArcInfo .e00 format. Download individual .dem or .e00 files.

Texas

http://www.tnris.state.tx.us/digital.htm

DRG 1:24K NAD27 UTM collarless. In tif format with .tfw and .fgd files. .tfw file coordinates are in NAD83. Full geotiff tags in NAD27. Standard resolution, semi-standard filenames. Download zipfile.

DOQQ 1 meter/pixel CIR NAD83 UTM in MrSID format with .sdw file. Minimal artifacts even at 2x zoom. 2.5 meter/pixel CIR NAD83 UTM in tif format with .tfw. Full geotiff tags. Download zipfile.

DEM 1:24K 30 meter grid. NAD27 UTM. Download zipfile.

DLG county-wide "urban data" in .e00 format, lat/lon NAD83. Download zipfile.

Utah

http://agrc.utah.gov/agrc_sgid/sgidintro.html

http://maps.utah.gov/mapindex.htm

DRG 1:24K 1:100K 1:250K standard resolution, collared and collarless, color and B/W (collarless only), full geotiff tags on collared files, minimal geotiff collarless color, no geotiff on B/W images, non-standard filenames. UTM NAD27. No zipfile or .gz file. Download .tif and .tfw files. No .fgd metadata file.

DOQQ 1 meter and 4 meter/pixel B/W UTM NAD27 in .jpg format with .jgw file. No zipfile or .gz. Download individual files. These are full 7.5 x 7.5 min quads. Website claims NAD83, but actual is NAD27.

DLG 1:24K 1:100K various data layers in .e00 format. No zipfile or .gz.

DEM 1:24K 30 meter grid in self extracting .exe format.

Vermont

http://www.vcgi.org/pub/dataware/gisdata/layers_vcgi/

DEM 1:24K 30 meter grid in xyz ascii and ArcInfo binary grid format. Download self-extracting .exe file.

DLG 1:24K 50 and 100ft topo contours in .e00 format. Download self-extracting .exe file.

Virginia

http://www.radford.edu/~geoserve/Virginia.html

DRG 1:24k UTM NAD27. Standard resolution and filenames. Download zipfile with .tif and .tfw file. Full geotiff tags.

http://www.radford.edu/~geoserve/main_doqq.htm

DOQQ 1 meter/pixel CIR and B/W UTM NAD83 in MrSID format with .sdw file. Semi-standard filenames. Artifacts moderate at 2x zoom. Download zipfile.

DEM 1:24K 30 meter grid, NAD27 UTM in USGS DEM format, but filename has extension .cdo (rename .dem). Also available by county.

Washington

http://www.or.blm.gov/gis/resources/dataset.asp?cid=101

DRG 1:24K Standard resolution, 60 min x 30 min mosaic in MrSID format. UTM NAD27. Download in zipfile with .sdw file. Very large files.

http://www.or.blm.gov/gis/resources/dataset.asp?cid=102

DEM 1:24K 10 meter grid in USGS DEM format merged to 1 degree x 1 degree block. Download in zipfile format. Very large files.

http://wagda.lib.washington.edu/data/washdata.html

DRG 1:24K Standard resolution collared, full geotiff tags, standard filenames, UTM NAD27. Download zipfile with .tif and .tfw. Also .tfw83 for nad83 worldfile (conflicts with geotiff tags).

West Virginia

http://gis.dep.state.wv.us/data/

DRG 1:24K 1:100K 1:250K UTM NAD83, collarless. Minimal geotiff tags, non-standard filenames. Download individual .tif and .tfw files.

DOQQ 1 meter/pixel CIR UTM NAD83 in MrSID format with .sdw file. Artifacts minimal at 2x zoom. Full quad 7.5 x 7.5 min coverage. Non-standard filenames. Download zipfile.

DEM 1 x 1 degree block 27 meter grid, in .e00 format. UTM NAD83. Need conversion for Ozi. Download in .gz format. IE decompresses the file automatically on download, but leaves the .gz extension (remove the .gz). Decompressed files are extremely large >160 megabytes.

http://www.radford.edu/~geoserve/WestVirginia.html

DRG 1:24k UTM NAD27. Standard resolution and filenames. Download zipfile with .tif and .tfw file. Full geotiff tags.

Wisconsin

ftp://gomapout.dnr.state.wi.us/geodata/

DRG 1:24K 1:100K 1:250K Wisconsin Transverse Mercator NAD83 in tiff format with .tfw file. Minimal geotiff tags. Standard resolution and filenames. Download .tif and .tfw files for 1:24K or zipfile for others.

DEM Whole state in one 30 meter ArcInfo binary grid file. Download 70+ megabyte zipfile.

Wyoming

http://wgiac2.state.wy.us/html/index.asp

DRG 1:24K 1:100K 1:250K NAD27 UTM. Standard resolution and filenames. In geotiff with .tfw file, or MrSID with .sdw file. Geotiff has full tags. Download zipfile.

DOQQ 1 meter/pixel B/W. UTM NAD83 in MrSID format with .sdw file. Moderate artifacts at 2x zoom. Semi-standard filenames. Download zipfile.

DEM 1:24K 1:100K 10 meter (limited avail.) and 30 meter USGS .dem format or ArcInfo Ascii grid. Download zipfile.