TopoWorld Satellite Data

Earthmate.com is now offering 3D satellite data for most of the world. This data is packaged on pre-configured DVDs. Please click on the list of continents to see the 3D satellite data units available.

• Africa
• Asia
• Europe
• North America
• Oceania
• South America

In the map PDFs there are contiguous blocks identified for ordering with a number and letter combination (examples: A-2 or O-14.) Please select the block or blocks you, then input your order and payment information.

Topoworld ScreenShots

About the Data:
3D Satellite Data is a double layer of remotely sensed data. SRTM, or Shuttle Radar Topography Mission, is an elevation dataset that is derived from 90-meter postings. The SRTM data is used to generate detailed contours in XMap. Draped over the SRTM elevation data, Landsat 7 satellite imagery is a pseudo-color 14.25-meter resolution dataset. In XMap, these data sets can be fused to view 3D satellite imagery.

Landsat 7 Satellite imagery coverage is available for most of the world. SRTM elevation data is available between 60 degrees latitude north and south. See the maps for a visual explanation.

Some things to note about this data:
In datasets where the SRTM has not been masked out over water, one may encounter artifacts. The Shuttle’s radar reflects off the water in a non-rational manner, creating apparent elevation readings over water surfaces.

Landsat 7 data, at 14.25-meter resolution, has fine enough detail to see major roads and large structures. 14.25-meter resolution means that one pixel in the data represents 14.25 meters on the earth. Objects smaller than 14.25 meters will probably not be visible.

Ordering blocks in the maps linked above appear as different sizes for a couple of reasons. The objective is to provide as much contiguous data as will fit onto a DVD. Regions that have considerable terrain changes are larger file sizes than areas of similar geographic size that have a more homogenous terrain. Water areas create a small file size, so many islands or a larger coastline can be covered in one block. Finally, the map projection makes blocks to the far north or south appear larger than more equatorial blocks of similar geographic area.

Note: XMap 4.5 Service Pack 2 required to view TopoWorld Data if you are using a version a version of XMap prior to 5.0