Fig. 4 | Scientific Data

Fig. 4

From: Mapping of 30-meter resolution tile-drained croplands using a geospatial modeling approach

Fig. 4

Spatial distribution of tile drainage ground-truth data (16000 points) used for the accuracy assessment. These point data were manually identified from ESRI multi-resolution (15 m, 1 m, 0.6 m, and 0.3 m) aerial imagery basemap (sources include Esri, DigitalGlobe, Earthstar Geographics, CNES/Airbus DS, GeoEye, USDA FSA, USGS, Aerogrid, IGN, IGP, and the GIS User Community; Acquirement dates of imagery ranges from 10/2/2012 to 4/23/2017 which is identified using ESRI ArcMap identification tool from the imagery basemap).

Back to article page