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SDE Raster Dataset
Tags
LAND SURFACE, GEODATA, CARTOGRAPHY, EDC, EARTH SCIENCE, DEM, EROS, LIDAR, DIGITAL ELEVATION MODEL, GIS, RASTER, MAPPING, LANDFORMS, USGS, DIGITAL MAPPING, TOPOGRAPHY, TERRAIN ELEVATION
Raster DEM files are used to show the Digital Elevation Model of the LAS Class 2 surface. This allows the user to do analysis based on elevation.
MEDEM2 is a digital terrain elevation model of Maine with a 2 meter by 2 meter square grid or data spacing. Digital Elevation Model (DEM) is the terminology adopted by USGS to describe terrain elevation data sets in a digital raster form. The standard DEM consists of an array of elevations from ground positions at regularly spaced intervals, cast on a designated coordinate projection system. Elevation values are in meters. The data are a combination of DEMs from various lidar collections in Maine ranging from 2006 to 2012. The data overall are accurate to RSMEz 15cm. Where overlapping projects came together, the ArcGIS mosaic raster tool was used and the values were "blended" using that tool. For details on that process see the Esri documentation for that tool.
MEGIS, Maine GeoLibrary, USGS, USDA.
None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations.
Extent
There is no extent for this item.
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
MEGIS, Maine GeoLibrary, USGS, USDA.
State of Maine, time period of 2006-2012
See access and use constraints information.
None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations.
MEDEM2 is a digital terrain elevation model of Maine with a 2 meter by 2 meter square grid or data spacing. Digital Elevation Model (DEM) is the terminology adopted by USGS to describe terrain elevation data sets in a digital raster form. The standard DEM consists of an array of elevations from ground positions at regularly spaced intervals, cast on a designated coordinate projection system. Elevation values are in meters. The data are a combination of DEMs from various lidar collections in Maine ranging from 2006 to 2012. The data overall are accurate to RSMEz 15cm. Where overlapping projects came together, the ArcGIS mosaic raster tool was used and the values were "blended" using that tool. For details on that process see the Esri documentation for that tool.
Raster DEM files are used to show the Digital Elevation Model of the LAS Class 2 surface. This allows the user to do analysis based on elevation.
State of Maine, time period of 2006-2012
None
None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations.
MEGIS, Maine GeoLibrary, USGS, USDA.
See access and use constraints information.