Survey Tools
National Geodetic Survey (NGS) publishes their Horizontal and Vertical Control Marks.
These control marks can be queried by PID, Station Name, Radial, Rectangle, and
County. The result from each of these queries provides a list of control marks.
This web application converts the list of control marks into a graphical format
(kml) viewable in Google Earth.
National Geodetic Survey (NGS) converts elevations from NGVD 29 to NAVD 88 using
Latitude & Longitude. This web application creates a placemark at the
center of the screen within Google Earth that states the datum shift.
United States Geological Survey (USGS) created topographic maps of the United States
(1879 to 1992). This web application simply provides a name, number and a
hyperlink to download the applicable 7.5 minute (1:24,000 scale) quad map.
United States Geological Survey (USGS) created topographic maps of the United States
(1879 to 1992). This web application overlay's the applicable 7.5 minute (1:24,000
scale) quad map.