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2' contours from lidar
GIS Manager, Maine Office of GIS , GIS Manager
2' contours from lidar
Geospatial Data Presentation Form
vector line features.
This is a 2' contour layer portrayal of 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.The hillshade computation was created using GDAL 1.8 (gdal_contour -a elevation -i .6096 -off 0). The data are presented in UTM Zone 19N metric coordinates with elevations referenced to NAVD88. Elevations are given in both metric and English units.
Contour lines are used to show the Digital Elevation Model of the LAS Class 2 surface. This allows the user to do analysis based on elevation. In this layer the DEM has been converted to percent slope.
Time Period of Content
State of Maine, time period of 2006-2012
Maintenance and Update Frequency
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
LAND SURFACE, GEODATA, CARTOGRAPHY, EDC, EARTH SCIENCE, DEM, EROS, LIDAR, DIGITAL ELEVATION MODEL, GIS, RASTER, MAPPING, LANDFORMS, USGS, DIGITAL MAPPING, TOPOGRAPHY, TERRAIN ELEVATION (None)
elevation (ISO 19115 Topic Categories)
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be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions.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.
Data Set Credit
MEGIS, Maine GeoLibrary, USGS, USDA.
Native Data Set Environment
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; Esri ArcGIS 10.1.1.3143
Direct Spatial Reference Method
Raster Object Type
Map Projection Name
NAD 1983 UTM Zone 19N
Scale Factor at Central Meridian
Longitude of Central Meridian
Latitude of Projection Origin
Planar Coordinate Encoding Method
Planar Distance Units
Horizontal Datum Name
D North American 1983
Denominator of Flattening Ratio
See access and use constraints information.
SDE Raster Dataset
Metadata Reference Information
Maine Office of GIS
mailing and physical
SHS 145, 51 Commerce Dr.
State or Province
Contact Voice Telephone
Contact Electronic Mail Address
Metadata Standard Name
FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version
Metadata Time Convention