Sonoma County Land Class Points

001QSI20160229Sonoma County Land Class Pointsvector digital dataThis dataset contains the independent land class points used to verify the supplemental vertical accuracy of the LiDAR data in the Sonoma County project area. Land class categories include Cultivated, Forest, Tall Grass, Shrub, and Short Grass. Descriptions of each land class are provided in the 2014 Sonoma County Vegetation Mapping and LiDAR Program: Technical Data Report. Coordinates and statistical parameters for each point are included in the attribute table. This shapefile provides locations for independent land class points in the Sonoma County project area. 2013092820131126Ground condition during GPS sessionsCompleteNone planned-123.404098-122.35867638.91281438.212980NoneQSI, Sonoma County, GPS, RTK, Real Time Kinematic, Independent Land Class Points, Barren, Non-Natural Woody, Cultivated, Developed, Forest, Tall Grass, Shrub, Short GrassNoneSonoma County, Mendocino Lake, Dry CreekNoneThis dataset was contracted by the Sonoma County Vegetation Mapping and LiDAR Consortium (the Consortium), a group of public and private organizations. This dataset may be available for public distribution, information regarding the use of this dataset should be directed to the Consortium.Sonoma County, QSI1NoneIndependent Land Class PointsA total of 395 Individual land class check points in eight different land cover classes were collected; these classes included Cultivated, Forest, Tall Grass, Shrub, Short Grass. In order to further refine the USGS class standard for Grassland/Herbaceous, “above the knee” and “below the knee” were used as the defining line between tall grass and short grass. For Real Time Kinematic (RTK) collection, a Trimble R7 base unit was set up over an appropriate monument to broadcast a kinematic correction to a roving R8 unit. The roving unit records precise location measurements with a standard deviation error of ≤ 1.5 cm relative to the base control. All acquisition occurs during optimal GNSS conditions (e.g., 6 or more satellites and a Position Dilution of Precision [PDOP] below 3.0). Daily forecasts from Trimble Planning software ensure that these conditions are met.Independent land class points may not be equitably distributed throughout the study area. In some cases spatial distribution of land class points throughout the study area may also be influenced by private land access.Prior to and during the LiDAR acquisition survey land class points were collected throughout the study area. 20131126coordinate pair0.0000000270391375956080570.000000027039137595608057foot_usD NAD 1983 2011GRS 19806378137.0298.257222101VectorSimpleFALSE395FALSETRUESonoma County Independent Land Class PointsLand Class PointsQSIFeature Class395FIDInternal feature number.EsriSequential unique whole numbers that are automatically generated.FIDOID400ShapeFeature geometry.EsriCoordinates defining the features.ShapeGeometry000Numberunique IDQSIPoint id numbersUnique numeric identifier of featuresQSINumberDouble16156EastingX (easting) value in metersTrimbleX UTM coordinate defining the feature location.EastingDouble16156NorthingY (northing) value in metersTrimbleY UTM coordinate defining the feature location.NorthingDouble16156Known_ZZ recorded with GCP in metersTrimbleValue defining elevation location from ground control pointKnown_ZDouble16156Laser_ZZ from LiDAR points in metersQSIValue defining elevation location from TINed Surface ModelLaser_ZDouble16156DzChange in elevation, Z, in metersQSI, ASPRS Guidelines - Vertical Accuracy Reporting for Lidar DataValue defining delta Z from known location to TINed Surface Model.DzDouble16156Land_ClassLand class category- see Sonoma County Vegetation Mapping and LiDAR Program: Technical Data Report for description of land classesQSILand class categoryLand_ClassString5000Sonoma County Agricultural Preservation and Open Space Districtmailing and physical address

747 Mendocino Ave, Suite 100

Santa RosaCA95401USNot AvailableThis dataset was contracted by the Sonoma County Vegetation Mapping and LiDAR Consortium (the Consortium), a group of public and private organizations. This dataset may be available for public distribution, information regarding the use of this dataset should be directed to the Consortium.20160114Quantum Spatial, Inc. (QSI)physical

421 S.W. 6th Ave., Suite 800

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