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elevationDEM2024
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487500.000000
4873500.000000
5089500.000000
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GCS_NAD_1983_2011
Linear Unit: Meter (1.000000)
NAD_1983_2011_UTM_Zone_19N
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Elevation
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20260529
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NAP
NV5 Geospatial
859-277-8700
859-277-8901
523 Wellington Way
Lexington
KY
40503
US
Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)
20260529
ArcGIS Metadata
1.0
Maine_Elevation_DEM_2024
2025-09-08
NV5 Geospatial
Raster digital data
<div style='text-align:Left;'><div><div><p><span>Product: These are Digital Elevation Model (DEM) data for Maine as part of the required deliverables for the ME_WesternMtns_B24_WU301127 project. Class 2 (ground) LiDAR points in conjunction with the hydro breaklines were used to create a 1 meter hydro-flattened Raster DEM. Geographic Extent: 8 counties in Maine, covering approximately 5066 total square miles. Dataset Description: The ME_WesternMtns_B24_WU301127 project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.71 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, 2024 Rev. A. The data were developed based on a horizontal projection/datum of NAD 1983 2011 UTM Zone 19N, Meter and vertical datum of NAVD88 Geoid 18, Meter. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 6115 individual 1500 m x 1500 m tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 1500 m x 1500 m schema. Continuous breaklines were produced in geopackage file format. Ground Conditions: LiDAR was collected in spring and fall 2024, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications and meet ASPRS vertical accuracy guidelines, NV5 Geospatial utilized a total of 57 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 153 independent accuracy checkpoints, 122 in Bare Earth and Urban landcovers (122 NVA points), 31 in Tall Weeds categories (31 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.</span></p></div></div></div>
Maine_Elevation_DEM_2024
Maine
Carroll County
Coos County
Cumberland County
Franklin County
Kennebec County
Oxford County
Piscataquis County
Somerset County
Model
Raster
DEM
Remote Sensing
Elevation Data
Lidar
elevation
Maine GeoLibrary
GeoLibrary
Digital Elevation Model
DEM
Surface
JED
<div style='text-align:Left;'><div><div><p><span>None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the organization providing these data to the public would be appreciated for products derived from these data.</span></p></div></div></div>
No restrictions apply to these data.
true
-71.0780416397
-69.1734188939
45.9519547946
43.9983301233
Ground condition
2024-10-17
2024-11-15
Raster File Type = GeoTIFF; Bit Depth/Pixel Type = 32-bit float; Raster Cell Size = 1 meter; Interpolation or Resampling Technique = Triangulated Irregular Network (TIN), Linear Interpolation, Proprietary; Required Vertical Accuracy = 0.196
Esri ArcGIS 13.5.5.57366
1
-71.096351
-69.155949
45.958957
43.996672
USGS, Maine GeoLibrary, MaineIT GIS, MEGIS
None.
None.
None.
NONE
QL2
Data cover the entire area specified for this project.
Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The raw point cloud is of good quality and data pass Non-Vegetated Vertical Accuracy specifications.
This data set was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 17 (cm) RMSEh Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 30 cm at a 95% confidence level.
This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class.
Hydro-Flattened Raster DEM Processing: Class 2 (Ground) LiDAR points in conjunction with the hydro-breaklines were used to create a 1 meter hydro-flattened raster DEM. Using automated scripting routines in proprietary software, GeoTIFF files were created for each tile. Each surface was reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface.
2025
2
1500
1.000000
1500
1.000000
1
0
337500.000000 4873500.000000
337500.000000 5089500.000000
487500.000000 5089500.000000
487500.000000 4873500.000000
412500.000000 4981500.000000
withheld
None.
EPSG
8.2.2(10.2.1)
Band_1
1291.906494
37.593647
32
m
Digital Elevation Model
False
False
False
False
False
11B02DFF-5076-48BB-861E-572F0BEE90A4
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