On this page I am assembling a collection of mapping and terrain modeling tools.
This is an ongoing effort and I'm just getting started so come back later if it
isn't developed enough for you now.
Grid (lat/lon)
Water bodies
Shoreline
State Bounds
Indian Resv.
Counties
Cities/Towns
City labels
Zipcode points
Parks and Other
Railroad
Highways
Interstate labels
US Hwy labels
St Hwy labels
Streets Note: Due to the way the server clobbers its input you must be sure to uncheck the layer's opposite option.
Get a legend instead of a map
onoff Get a legend
Place additional marker on map
Longitude (deg):
Latitude (deg):
Symbol:
Label:
Thematic Level
The Thematic Level selects a geography level for drawing thematic statistical maps.
Thematic Variable
Thematic variable selects a statistical variable to use in thematic maps.
Thematic Method
Thematic method selects the classification method to use in thematic maps
These classes are calculated over the entire country, not just the map area. Quintiles (5 classes of equal size) tend to provide better contrast between values around the average, while Equal Interval (5 classes with an even range of values) tends to emphasize the extremes.
I made an imagemap index of the USGS 7.5' DEM archive so that the DEMs can be
found by map location instead of only by name. The imagemaps are also linked to
listings of DEMs by coordinate order just in case you wish to yse a text only
interface (silly in this case).
There are other scale DEMs as well as the 7.5' ones and pointers to where they
may be found together with brief specifications can be found on my DEM Data Sets & Information page.
The USGS EROS Data Center's GTOPO30 is a global digital elevation model (DEM)
with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer).
Here is an image map interface to the GTOPO30.
NIMA has an imagemap interface to their publicly available Digital
Terrain Elevation Data (DTED®) Level 0 30 Arc Second Terrain Data of much of
Earth's surface.
