Overview

RevealEarth - True Color Elevations v2.5

Product Overview

Content

Product Overview

RevealEarth - True Color Elevations is created from GLOBE and the Blue Marble. Both datasets are of 1km ground resolution and global geographical span.

In normal mode, users can traverse the vast Blue Marble true color imagery (21600 x 43200 pixels) and view cursor point longitude, latitude and elevation data.

Switching on "Image 3D Study", a second window appears in the RevealEarth browser to display a 3D visualization of the GLOBE digital elevation model (1m vertical resolution) with true color surface texture.

Additional browser features, such as visual indexing, filtering and smoothing, further facilitate data interpretation and illustration.

RevealEarth - True Color Elevations is created using InforShell proprietary technology that applies RDBMS to image data management. Very large images and datasets such as the Blue Marble and GLOBE (conventionally divided into tiles) are comfortably presented in entirety.

As reference material or for use in education, logistical applications, etc, RevealEarth - True Color Elevations gives users the whole picture on a PC platform.

Data Source and Accuracy

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 RevealEarth 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 One-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.

Image Levels

Three image levels are accessible through the "Zoom" feature (at a constant zoom ratio of 1:10). The top two levels: layer 0 at 100km resolution, i.e. 100kmX100km per pixel, and layer 1 at 10km resolution serve as visual indexes to the bottom level (layer 2) at 1km resolution. Longitude, latitude, elevation data retrieval and various data analysis functionality are only provided on layer 2.

Reveal Earth Browser

The RevealEarth browser is a user-friendly multi-document GUI designed to translate stored data back to image form, and provide 3D visualization, zoom, pixel analysis, filtering, smoothing, longitude-latitude and elevation display features. Image display continuity ensures uninterrupted navigation across images of extraordinary dimensions.