Quick Links

Micropath program to unzip, rename and manage USGS NED and SRTM elevation data.

Download NedExtractor

Open or download NedExtractor Help file

HDD32.exe. An old Hasp Key driver but always works.

HDD32.exe

Latest "Sentinel Driver. Suppose to be backwards compatible with Hasp HL.

Sentinel_HASP_Run-time_setup.zip

USGS EROS Data Center Home

PrePackaged NED download. An easy to use interface to download NED 1 and 1/3 arc-second elevation data.

NED 1 and 1/3 arc-second data Download Tool.

Download SRTM1 1-Second Elevation Data (SRTM1)

Display SRTM1 Region Map

Download SRTM3 3-Second Elevation Data (SRTM3)

GeoBase is a federal, provincial and territorial government initiative that is overseen by the Canadian Council on Geomatics (CCOG). It is undertaken to ensure the provision of, and access to, a common, up-to-date and maintained base of quality geospatial data for all of Canada. Through the GeoBase portal, users with an interest in the field of geomatics have access to quality geospatial information at no cost and with unrestricted use.

GeoBase Web Home Page

FTP Home

FTP Data Indexes - Google Earth KML-KMZ Files, ZIP Files

FTP CDED 50k DEM Download

The Mission of NOAA's National Geophysical Data Center (NGDC) is to provide long-term scientific data stewardship for the Nation's geophysical data, ensuring quality, integrity, and accessibility.

A treasure trove of online calculations, product downloads, and scientific information.

National Geophysical Data Center (NGDC)

Link to ITU publications.

ITU-R Recommendations

P - Radiowave Propagation

P.530-14 - Propagation data and prediction methods required for the design of terrestrial line-of-sight systems

P.833 - Attenuation in Vegetation