
Seamless Data Download from the USGS #67
Chapter 6, Mapping on Your Desktop
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HACK
The Results
I’m sure you’ve had that eureka moment by now, realizing you have the basic
skills needed to be the best mapmaker on your block. In addition to the sites
mentioned earlier, government resources like EPA’s Enviromapper (http://
www.epa.gov/enviro/wme/ and http://www.epa.gov/enviro/html/multisystem_
query_java.html) can tell you all about pollution in your community, and the
Census Bureau (http://www.census.gov/) gives you the scoop on demographic
statistics like race, income, and employment. Just think of the killer maps
you can help your children produce for their next class paper!
—Raj Singh
HACK
#67
Seamless Data Download from the USGS Hack #67
Finding geospatial data for your area becomes (almost) seamless with help
from the USGS.
Need digital map data for some region of the United States, but don’t know
your FIPS codes from your NADs? Help is at hand in the USGS Seamless
Data Distribution System, or SDDS. The SDDS is a web-based, DHTML
interface that allows you to zoom in on a map of the U.S., select an area
visually, and download the data layers of your choice, corresponding to your
visual selection. This sure beats the traditional method of fetching GIS data
from random FTP servers by USGS topo quadrangle name or, worse yet,
some obscurely coded filename!
Start by firing up http://seamless.usgs.gov/