C Technologies Mobile Information Collector C-Pen Manual de usuario descargar pdf (Pagina 64)

NGS / NOAA GPS Site

The U.S. Department of Transportation s Civil GPS Service has designated NOAA to be the federal agency responsible

for providing accurate and timely Global Positioning System (GPS) satellite ephemerides ( orbits ) to the general public.

http://ngs.noaa.gov/GPS/GPS.html

Satellite Predictor

Naval Air Warfare Center W eapons Division, China Lake, CA

This utility shows what satellites are visible from a given location at a specified time

http://sirius.chinalake.navy.mil/satpred/

Tycho - U.S. Naval Observatory

Computes GPS/GLONASS Satellite Position based on local latitude and longitude.

http://tycho.usno.navy.mil/gps-altaz.html

U.S. Army - Construction Engineering Research Laboratory (CERL)

The home of the GRASS public domain GIS, the Open-GIS (OGIS) foundation, also spatial modeling information.

http://www.cecer.army.mil/

U.S. Bureau Land Management

Includes a GIS page with data and information relevant to land management.

http://www.blm.gov/

U.S. Bureau of the Census

General information and access TIGER census data and much other statistical information for the U.S.A.

http://www.census.gov/

U.S. Coast Guard (official GPS site)

Provides DGPS and GPS status and almanac information.

http://www.navcen.uscg.mil/

http://www.nis-mirror.com (mirror site)

U.S. Department of the Interior

Provides a gateway to all of the U.S. government agencies responsible for conservation and natural resource

management.

http://info.er.usgs/doi/doi.html/

U.S. Environmental Protection Agency

Includes information on projects using GIS such as their National Estuary Program. Also some information on software

and data.

http://www.epa.gov/

U.S. Federal Geographic Data Committee

This agency is responsible for coordinating the survey, mapping and spatial data activities of various federal agencies.

Promotes the Spatial Data Transfer Standard (SDTS). Includes links to all the U.S. National Spatial Data Infrastructure

(NSDI) sites.

ftp://fgdc.er.usgs.gov/gdc/html/fgdc.htm

U.S. Fish and Wildlife Service

Inventory that provides access to GIS data. Supports the U.S. National Wetlands a relating to US Wetlands in a number

of different formats.

http://www.fws.gov/data/gps.html

U.S. Geological Survey

Provides an overview of GIS technology.

http://info.er.usgs.gov/research/gis/title.html

USGS Geographic Names Information System

The Geographic Names Information System (GNIS), developed by the USGS in cooperation with the U.S. Board on

Geographic Names (BGN), contains information about almost 2 million physical and cultural geographic features in the

United States.

http://www-nmd.usgs.gov/www/gnis/gnisform.html

ftp://www-nmd.usgs.gov/pub/gnis (FTP format)

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