d125cfee-7df5-47a9-8fd6-14186a9f9ac6 Woodruff, Craig, D craig.woodruff@usda.gov 2024-08-29T20:26:35.581212Z ISO 19115:2003/19139 1.0 WGS 1984 Johnston Draw (Idaho) High Resolution Pre-Fire Vegetation Map 2023 2024-05-07 10.15482/USDA.ADC/25684290 The variability of vegetation in rangelands can be over generalized in spatial representation and vegetation types mapped by moderate resolution vegetation maps. A high resolution (<1 meter), site specific, vegetation map may better represent the diversity and spatial complexity of rangelands &#8211; a necessity for analyzing pre-fire conditions. We pansharpened two 8-band VNIR Worldview 2 scenes to map pre-fire vegetation in Johnston Draw (1.8 square kilometers) in the Reynolds Creek Experimental Watershed in Southwest Idaho. The two Worldview 2 scenes represent peak greenness (June 14, 2023) and pre-fire (September 23, 2023) conditions with spatial resolutions of 50 centimeters and 42 centimeters, respectively. A prescribed fire burned the area on October 6, 2023. We trained a pixel based random forest classifier to map 10 site specific vegetation classes at a 50-centimeter spatial resolution. We applied a majority filter to remove speckling. Map accuracy was 83.3% when validated using a test set of 54, 30-meter diameter, plots selected to represent the following dominant vegetation types: deciduous/riparian (classes were collapsed into a single class for validation), living juniper, dead juniper, sagebrush, mixed low sage and bunchgrass, bitterbrush, and annual grasses. Barren and water classes were not validated. Training data was developed through a combination of site visit based knowledge and a training set of 30-meter diameter dominant vegetation class plots. The 1.5-billion-dollar cost of fire prevention, suppression, and restoration is stretched thin over the vast area of wildfire occurrence, where site-specific high-resolution vegetation maps are essential to mitigate fire potential and address post fire recovery. In addition to the pre-fire vegetation map a post fire burn product will also be submitted to Ag Data Commons and the related materials will be updated to reflect these complimentary submissions. The intended use of the vegetation map is for reference and analysis of the pre-fire vegetation conditions for in Johnston Draw ahead of a prescribed fire that occurred on 10-6-2023. This high resolution dataset will be useful exceptionally useful for models that rely on vegetation cover including but not limited to hydrologic models; erosion models; and post fire analyses of fire continuity, severity, and recovery. 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Please choose from U.S. Public Domain, Creative Commons CCZero, Creative Commons Attribution, or Creative Commons Attribution Share-Alike. Prescribed fire Juniper Treatment Remote Sensing High Resolution Random Forest Vegetation mapping RANGELANDS geoscientificInformation environment 2023-06-14 2023-09-23 -116.8036544 -116.7737624 43.1193418 43.1345622 TFW 1 TIF 1 XML 1 OVR 1 CPG 1 DBF 1 https://doi.org/10.15482/USDA.ADC/25684290 DOI Data files Data files for Johnston Draw (Idaho) High Resolution Pre-Fire Vegetation Map 2023 Estimates of water may be over representative near barren rocks due to shadows. Distribution of bitterbrush is slightly overestimated on northern facing slopes near the riparian areas. Riparian/deciduous and deciduous/riparian are listed as separate classes but were validated as a single class because young quaking aspens were confused with riparian pixels. Dead juniper exists in the northeast portion of the watershed and bare soil is misclassified as dead juniper near the large barren areas and in the interspace of living juniper stands. The stream in Johnston draw is not identified as water because it is an intermittent stream.