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Johnston Draw (Idaho) High Resolution Pre-Fire Vegetation Map 2023

Metadata Updated: April 21, 2025

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 – 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.

Access & Use Information

Public: This dataset is intended for public access and use. License: Creative Commons Attribution

Downloads & Resources

Dates

Metadata Created Date May 31, 2024
Metadata Updated Date April 21, 2025
Data Update Frequency irregular

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date May 31, 2024
Metadata Updated Date April 21, 2025
Publisher Agricultural Research Service
Maintainer
Identifier 10.15482/USDA.ADC/25684290.v1
Data Last Modified 2024-05-29
Category geospatial
Public Access Level public
Data Update Frequency irregular
Bureau Code 005:18
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 1c775e3f-5ed0-415c-9281-2f9c01d65bda
Harvest Source Id d3fafa34-0cb9-48f1-ab1d-5b5fdc783806
Harvest Source Title USDA JSON
License https://creativecommons.org/licenses/by/4.0/
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": -116.8034633, 43.1345622, -116.8036544, 43.1195483, -116.7739607, 43.1193418, -116.7737624, 43.1343556, -116.8034633, 43.1345622}
Program Code 005:040
Source Datajson Identifier True
Source Hash da92048f5cfe1bb017b3f6838ea2850917a6234492216f6b0f2cc2231019432e
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -116.8034633, 43.1345622, -116.8036544, 43.1195483, -116.7739607, 43.1193418, -116.7737624, 43.1343556, -116.8034633, 43.1345622}
Temporal 2023-06-14/2023-09-23

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