Free US State GIS Sources
State sites
Country sites
Key data
General free data
Caveats on these lists.
State
Map Data Online
AK
http://www.asgdc.state.ak.us/
http://agdc.usgs.gov/data/
http://maps.dggs.alaska.gov/lidar/#-16000000:9338001:4
http://maps.dggs.alaska.gov/elevationdata/#-16000000:9338001:4
http://www.dggs.alaska.gov/pubs/id/22722
High-resolution lidar data for Alaska infrastructure corridors
http://portal.aoos.org/#module-search?page=1&tagId=65&q=
topography and bathymetry
AZ
Pima County:
http://www.dot.pima.gov/gis/ftp/overview.cfm
has 277 layers in shape file format
CA
San Francisco:
https://data.sfgov.org/
Sonoma County lidar:
http://sonomavegmap.org/
http://walrus.wr.usgs.gov/mapping/csmp/gis.html
offshore bathy, high res grids
CO
CT
http://magic.lib.uconn.edu
http://magic.lib.uconn.edu/historical_maps.htm
DC
http://opendata.dc.gov/
Lidar:
http://geospatial.dcgis.dc.gov/templates/dcfinder/s2.html?appid=62c9607bcfb349d5988e39390d50e995
DE
http://stateplanning.delaware.gov/dgdc
/
FL
http://
www.labins.org
--DRGs, DOQQs
http://www.floridadisaster.org/gis
GA
https://data.georgiaspatial.org/login.asp?CookieTest=2
(must register)
HI
http://www.hawaii.gov/dbedt/gis/
http://www.vterrain.org/Hawaii/DRG/drg.html
http://www.soest.hawaii.edu/coasts/data/index.html
IA
http://ortho.gis.iastate.edu/
http://www.iowadatacenter.org/
state census data
ID
IL
IN
http://www.indiana.edu/~gisdata/
KS
http://www.kansasgis.org/
KY
http://kygeonet.ky.gov/
http://kymartian.ky.gov/demwebusgs/index.html
(DEMs in SPCS)
ftp://ftp.kymartian.ky.gov/DEM_UTM
(UTM DEMs)
LA
http://atlas.lsu.edu/
http://atlas.lsu.edu/lidar/
MA
http://www.state.ma.us/mgis/laylist.htm
http://www.mass.gov/mgis/massgis.htm
http://www.mass.gov/mgis/download.htm
http://www.mass.gov/mgis/colororthos2005.htm
Lidar:
https://docs.digital.mass.gov/dataset/massgis-data-lidar-terrain-data
MD
http://dnrweb.dnr.state.md.us/gis/data/
http://dnrweb.dnr.state.md.us/gis/data/data.asp
http://www.mdmerlin.net/
http://www.mgs.md.gov/coastal/maps/schangevect.html
Historic shorelines
Anne Arundel County:
http://www.aacounty.org/land-use/Land_Use__Reports/county-maps--gis-data
http://www.mdp.state.md.us/
Lidar point clouds:
http://lidar.geodata.md.gov:8080/ExpressZip
http://imap.maryland.gov/Pages/lidar-download.aspx
ME
http://megis.maine.gov/catalog/
http://www.seagrant.umaine.edu/coastal-hazards-guide/maps-and-resources
MI
http://www.mcgi.state.mi.us/mgdl/
(Much of the Michigan data uses a currently unsupported and unique state plane coordinate projection)
http://www.mcgi.state.mi.us/mgdl/?action=thm
Detroit: https://data.detroitmi.gov/
MN
http://deli.dnr.state.mn.us/
--Department of Natural Resources data downloads
http://www.mngeo.state.mn.us/chouse/elevation/lidar.html
DNR Lidar
ftp://ftp.lmic.state.mn.us/pub/data/elevation/lidar/
https://www.dnr.state.mn.us/maps/mntopo/index.html
elevation data from lidar
MO
http://www.msdis.missouri.edu/
MS
MT
NB
NC
http://www.cgia.state.nc.us/DataResources/tabid/55/Default.aspx
http://www.ncfloodmaps.com/
--20 m and 50 ASC grids which MICRODEM displays, and raw XYZ files for bare earth which could be imported into the
TIN module
or gridded with
GMT
.
NH
http://www.granit.unh.edu/
http://www2.des.state.nh.us/gis/onestop/
NJ
https://njgin.state.nj.us/NJ_NJGINExplorer/index.jsp
NM
http://sar.lanl.gov/maps_by_name.html
--DRGs
http://rgis.unm.edu
NV
Clark County, NV:
http://gisgate.co.clark.nv.us/openweb/asp/openweb.asp
Keck Library:
h
ttp://keck.library.unr.edu/datawarehouse.html
NY
PLUTO: NYC properties,
http://www.nyc.gov/html/dcp/html/bytes/applbyte.shtml#pluto
OH
http://ogrip.oit.ohio.gov/ProjectsInitiatives/OSIPDataDownloads.aspx
OK
http://geo.ou.edu/cgi-bin/redesign.cgi?ft=db&template=DataState.htm&SORT=Subject,LayerName
OR
http://oregonexplorer.info/imagery/about/about.aspx?Res=17270
half meter imagery
https://www.oregon.gov/geo/Pages/imagery_data.aspx
one foot current imagery, and older collections
Oregon Lidar consortium
http://www.oregongeology.org/sub/projects/olc/default.htm
(data is apparently $200 per DVD; there is free data at OpenTopography)
PA
http://www.pasda.psu.edu/
http://www.pennpilot.psu.edu/
RI
http://www.rigis.org/
SC
LIDAR:
http://www.dnr.sc.gov/GIS/lidar.html
CLICK and NOAA have the LAS files
TN
TX
https://tnris.org/
http://magic.csr.utexas.edu/index.htm
includes 2 m NAIP
UT
http://nrwrt1.nr.state.ut.us/quads/
(DOQs and DRGs)
ftp://ftp.agrc.state.ut.us/DOQMrSid/
VA
lidar, in zLas
https://vgin.maps.arcgis.com/home/item.html?id=1e964be36b454a12a69a3ad0bc1473ce
VT
http://vcgi.vermont.gov
WA
http://wagda.lib.washington.edu/
http://lidarportal.dnr.wa.gov/
Geology:
https://www.dnr.wa.gov/programs-and-services/geology/publications-and-data/gis-data-and-databases
WV
http://www.wvgis.wvu.edu/
http://www.wvgis.wvu.edu/data/data.php
WY
http://www.sdvc.uwyo.edu/
Last revision 1/17/2018