|TOPODATA - Index Map|
|Written by Eduardo Kanegae|
|Sunday, 28 August 2011 16:30|
About this map
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INPE\TOPODATA project offers free access to local geomorphometric variables derived from SRTM data, throughout the entire Brazilian territory. The refined data was derived with geomorphometric analyses algorithms to calculate slope (steepness), slope direction, plan curvature and profile curvature.
In addition to these, a second order derivation was applied to enhance thalweg and divides, which were overlaid on a slope direction presentation, as input for the interpretation of drainage features and structure.
The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near-global scale to generate the most complete high-resolution digital topographic database of Earth. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000. SRTM is an international project spearheaded by the National Geospatial-Intelligence Agency (NGA) and the National Aeronautics and Space Administration (NASA).
+ new version using MapServer MapCache engine
+ OpenLayers updated from 2.10 to 2.12
+ Usage statistics was added (in portuguese interface only)
+ zoom options using keyboard
+ zoom max/min is reseted when user found limits
+ scenes 01S45_ , 05S36_ , 09S36_ and 11S375 was updated (see https://twitter.com/webmapit/status/263278229891190784 )
+ new hosting server (see https://twitter.com/webmapit/status/246053999315386368)
+ destiny URLs was adjusted to new INPE's server file structure
+ new layer 'Shaded relief' (select window)
+ english version published
+ zoom limits: users can't zoom outside Brazil
+ hidrografy layer was added (select window)
@ 1st public version