Backgrounds/tree_canopy_2020 (MapServer)

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Service Description:

Tree Canopy is defined as vegetation 8 feet tall or higher. Montgomery Planning regularly purchases LiDAR data to support various products, and the interactive tool you will see below is is one such product. Four band infrared imagery is combined with LiDAR to extract our tree canopy layers.

The 2009, 2014, and 2018 tree canopy layers used the "QL2" LiDAR standard, which captures only 4 samples per square meter. Starting with the department’s 2020 tree canopy layers, a higher quality LiDAR standard called "QL1" was used. This new technology captures 8 samples per square meter.

The new QL1 technology is better able to capture smaller saplings that the QL2 technology could have have missed. QL1 also has the ability to better detect the fringes of tree canopy. Because of the higher resolution of QL1, the overall tree canopy capture for any given area is higher than it would be if it were measured by the older QL2 today.

For more information, contact: GIS Manager Information Technology & Innovation (ITI) Montgomery County Planning Department, MNCPPC T: 301-650-5620

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tree_canopy_2020 (0)

Description: Tree Canopy is defined as vegetation 8 feet tall or higher. Montgomery Planning regularly purchases LiDAR data to support various products, and the interactive tool you will see below is is one such product. Four band infrared imagery is combined with LiDAR to extract our tree canopy layers. The 2009, 2014, and 2018 tree canopy layers used the "QL2" LiDAR standard, which captures only 4 samples per square meter. Starting with the department’s 2020 tree canopy layers, a higher quality LiDAR standard called "QL1" was used. This new technology captures 8 samples per square meter. The new QL1 technology is better able to capture smaller saplings that the QL2 technology could have have missed. QL1 also has the ability to better detect the fringes of tree canopy. Because of the higher resolution of QL1, the overall tree canopy capture for any given area is higher than it would be if it were measured by the older QL2 today. For more information, contact: GIS Manager Information Technology & Innovation (ITI) Montgomery County Planning Department, MNCPPC T: 301-650-5620

Service Item Id: cd09659612b341f5bd561b0045afeeaf

Copyright Text: Information Technology & Innovation (ITI), Montgomery County Planning Department, MNCPPC University of Vermont Spatial Lab

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