Canadian Government

Geologic Survey of Canada

GSC - Gravity Theory

GSC - Gravity Formulae

Gravity Base Station Database Login

Canadian Digital Elevation Data (CDED)

• .dem files are Surfer-compatible as USGS dem format

Geomagnetism

• storm forecasts
• magnetic declination calculator

Free Data from AltaLis

AltaLis Provincial Boundary File

• NAD83 Decimal Degrees, .shp, (325 kb), 20k points
• Another line

Other Boundary Data

• Parks, Forestry, Wildlife, NTS Grid, Recreational Use Areas

Small Scale Provincial Base Maps

• 1:1M, 1:2M, Township-Range Grid

Maps, Survey and Topo Data for New Brunswick

High Precision Control Network (HPCN)

DEM Data Tiles

• 1:10,000 mapsheets, 70 m avg point spacing

US Government

National Geospacial Agency Publications

National Geodetic Survey - Software downloads

USGS

Latest Earthquake Activity

Seamless Elevation Data

NASA

SRTM 3-arc second elevations (90 m spacing) - FTP site