Product Overview
In normal mode, users can traverse the vast Blue Marble true color imagery (5400 x 10800 pixels) and view cursor point longitude, latitude and elevation data.
Switching on "Image 3D Study", a second window appears in the MapRoamer browser to display a 3D visualization of the GLOBE digital elevation model (1m vertical resolution) with true color surface texture.
RoamEarth is created from GLOBE and the Blue Marble. Both datasets are of 4km ground resolution and global geographical span.
Figure 1. True color elevation 3D study
Figure 2. False color elevation shaded relief study
Figure 3. Line's elevation profile
As reference material or for use in education, logistical applications, etc, RoamEarth gives users the whole picture on a PC platform.
Source data, the Blue Marble image and GLOBE digital elevation model, have been processed and stored in InforShell proprietary formats. Images and elevation data retrieved through the MapRoamer browser are equal to the original.
Blue Marble: Land Surface, Shallow Water, and Shaded Topography
True color global imagery at 1km resolution owned by NASA, and created by the Earth Observation team (http://earthobservatory.nasa.gov/). Details http://visibleearth.nasa.gov/cgi-bin/viewrecord?11656
GLOBE DEM:
Global Land Four-kilometer Base Elevation - Digital Elevation Model compiled by NGDC (US National Geophysical Data Center). Credits: GLOBE Task Team and others (Hastings, David A., Paula K. Dunbar, Gerald M. Elphingstone, Mark Bootz, Hiroshi Murakami, Hiroshi Maruyama, Hiroshi Masaharu, Peter Holland, John Payne, Nevin A. Bryant, Thomas L. Logan, J.-P. Muller, Gunter Schreier, and John S. MacDonald), eds., 1999. The Global Land One-kilometer Base Elevation (GLOBE) Digital Elevation Model, Version 1.0. National Oceanic and Atmospheric Administration, National Geophysical Data Center, 325 Broadway, Boulder, Colorado 80303, U.S.A. Digital data base on the World Wide Web (URL: http://www.ngdc.noaa.gov/seg/topo/globe.shtml) and CD-ROMs.
Two image levels are accessible through the "Zoom" feature (at a constant zoom ratio of 1:10). The top level: layer 0 at 40km resolution, i.e. 40kmX40km per pixel, and layer 1 at 4km resolution. Longitude, latitude, elevation data retrieval and various data analysis functionality are only provided on layer 1.
The MapRoamer browser is a user-friendly multi-document GUI designed to translate stored data back to image form, and provide 3D visualization, zoom, find, pixel analysis, filtering, smoothing, longitude-latitude and elevation display features. Image display continuity ensures uninterrupted navigation across images of extraordinary dimensions.
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