EarthSLOT Global Earth Models |
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These are models that we created using Skyline's TerraBuilder. They are considered global models that cover the entire planet to distinguish them from planar models (below) which are essentially floating rectangles of data that cover only a limited area.
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EarthSLOT TBP |
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This is our most detailed earth model, which is used in most of our applications. Click here to fly around this model now.
Global Ocean Surface Imagery Global Land Surface Imagery Antarctica Low Resolution Imagery Antarctica High Resolution Imagery Aerial Imagery - Denver, Colorado Aerial Imagery - Boston, Massachusetts Aerial Imagery - San Francisco, California Aerial Imagery - Washington, DC Aerial Imagery - Greenbelt, Maryland Aerial Imagery - National Petroleum Reserve
- Alaska Aerial Imagery - Minnesota Satellite Imagery - Barrow, Alaska Satellite Imagery - Fairbanks, Alaska Satellite Imagery - Lake Elgygytgyn, Russia Pan-Sharpened GeoCover 2000 Imagery Global Elevation Data Set Elevation Data - Alaska Elevation Data - Barrow, Alaska Elevation Data - Fairbanks, Alaska Elevation Data - Kuparuk River Basin &
Put River Basin, Alaska Elevation Data - Pinion Canyon Manouver
Site, Colorado Elevation Data - San Francisco, CA - Denver,
CO - Washington, DC - Greenbelt, MD Elevation Data - British Isles Elevation Data - Arctic Ocean, High Resolution,
East-Northeast of Barrow
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| Blue Marble 2000 | |
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The original Blue Marble. Click here to fly over this model. Imagery Data Elevation Data
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| Blue Marble Next Generation | |
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This is a set of 12 cloud free MODIS mosaics created at NASA's Goddard Space Flight Center. The elevation data consists of processed SRTM data, as well as GTOPO30 data for the areas that were not covered by SRTM. Global Imagery Data Global Elevation Data Set |
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| Alaska Geospatial Climate Animations | |
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These MPTs have model output of temperature and precipitation of Alaska draped over terrain. Click here to fly over the air temperature data. Global Imagery Data Alaska Imagery Data Global Elevation Data
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| Circum-Arctic Vegetation Map (CAVM) | |
Global Imagery Data Seward Peninsula (Alaska) Imagery Data Global Elevation Data Set |
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| Central America | |
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Contains a lot of high resolution satellite imagery used in support of NASA's SERVIR project. Click here to fly over this model. Imagery & Elevation Data
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| SRTM GTOPO 30 Shaded | |
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A shaded relief MPT of the entire globe. Click here to fly over this model. Imagery & Elevation Data
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EarthSLOT Planar Earth Models |
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These are earth models that are not global in nature; rather they are rectangles of data floating in space. We typically create them to save disk space (making them easily portable) or to highlight an area of interest.
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| Circum-Arctic Vegetation Map (CAVM) | |
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Imagery Data Elevation Data
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| International Bathymetric Chart of the Arctic Ocean (IBCAO) | |
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Click here to fly over this model. Imagery & Elevation Data
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| Alaska - Kuparuk - C4 | |
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Shows off the power of high resolution elevation data in a very flat area of Alaska. Click here to fly over this model. Imagery & Elevation Data
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| Alaska - Isabel Pass | |
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Shows off the power of high resolution elevation data in a mountainous region of Alaska. Click here to fly over this model. Imagery & Elevation Data
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| Alaska - Upper Kuparuk River Basin | |
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A nice blend of Landsat sharpened with radar backscatter draped over high resolution terrain. Click here to fly over this model. Imagery & Elevation Data
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| Alaska - Put River Basin | |
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A really low-relief watershed in Arctic Alaska. Click here to fly over this model. Imagery & Elevation Data
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| Alaska - Toolik Lake Field Station GIS | |
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Click here to fly over this model. Imagery & Elevation Data
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| Colorado - Pinion Canyon Manouver Site | |
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Drapes soil moisture output derived from InSAR over high resolution elevation data. Click here to fly over this model. Imagery & Elevation Data
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Google Earth Model |
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Click here to fly over this model.
Google's Earth Model contains the most high resolution imagery of any model here, particularly of urban areas. You can find a graphical illustration of their data sources here, where you will also find a pdf with further information. As of 09/29/05 there is contradicting information as to how Google Earth (GE) represents the world. Many on the Community BBS note that GE is using a perfect sphere as globe model. The official GE web site states that "As Google Earth currently uses WGS84 datum projection". When enabling some of the data layers that are delivered with GE, or when connecting WMS-served WGS84 data to GE, one can clearly see gross misalignment between the data layers and the underlying imagery. While co-registration errors can have many causes, it is likely that GE does indeed NOT use WGS84 as their Earth model. GE does not support planar models. There are no indications that GE plans to include planar model support in the future.
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World Wind Earth Model |
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World Wind primarily uses the original Blue Marble and the Landsat 7 Geocover 2000 data; you can read more about this here. NASA's World Wind uses the WGS84 earth model. Interestingly enough, considering that World Wind doesn't contain a re-projection engine, it seems that some of the data served on World Wind is in NAD83. In practical terms many argue that NAD83 equals WGS84. Data that is served through World Wind via WMS tends to line up well with the underlying imagery. World Wind does not support planar Earth models. There are no indications that World Wind plans to include planar model support in the future. However, since the entire World Wind source code is open source, those with the appropriate skills could add planar model support if they so desire. |
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