A demonstration of DEMBroker will appear below in a Java enabled browser.
Right click to move north, south, east or west, or zoom out to a wider area.
To zoom in, click and drag a box over an area of interest using the left mouse button.
Data is available at 1km resolution over the world from the GTOP30 dataset
http://www1.gsi.go.jp/gtopo30/gtopo30.html

and at 50m resolution over Japan.
Note that accessing the Japanese data set takes much longer than accessing the world data set (because it is stored in many small files), so it pays to zoom into a small area of Japan before switching.

If possible, the applet retrieves data at a high enough resolution that each pixel has a unique value.

In most cases this means that you get a uniform sampling of the DEM. If you zoom in close, the underlying resolution of the DEM becomes apparent.

DEMBroker doesn't do any interpolation of the data set at this stage - it retrieves the nearest DEM value to the location corresponding to the screen pixels.

Click to return to the DEMBroker home page
Return to MetBroker home page