Geospatial data for the Vegetation Mapping Inventory Project of San Juan Island National Historical Park
Description
The files linked to this reference are the geospatial data created as part of the completion of the baseline vegetation inventory project for the NPS park unit. Current format is ArcGIS file geodatabase but older formats may exist as shapefiles.
Prior to conducting field visits, existing vegetation maps, soils maps, wetland locations, and 2007 NAIP 6-inch color orthophotos, provided by the NPS, were used to delineate preliminary polygons using ArcGIS™ 9.3.1. Each polygon was assigned a "GIS_Poly" code. Some areas were difficult to map without field verification. A total of 544 polygons were mapped in the park. Vegetation classified at the Alliance-level was mapped correctly with an overall accuracy of 82.0 ± 5.2% (90% confidence intervals) and increases at higher NVC levels to 86.8%± 4.6% at the Division-level. Twenty-three of 32 Alliances in the AA (72%) meet the user‘s accuracy requirement of 80% established by the National Park Service Vegetation Inventory Program.
Resources
| Name |
Format |
Description |
Link |
|
57 |
ArcGIS geodatabase with metadata, .mxd and layer file |
https://irma.nps.gov/DataStore/DownloadFile/612411?Reference=2233385 |
Tags
- vegetation-inventory
- releve
- nvcs
- vegetation-mapping
- botanical-survey
- geodatabase
- national-vegetation-classification
- imagery
- vegetation
- vegetation-map
- remote-sensing
- classification
- habitat-types
- nvc
- plots
- accuracy-assessment
- usnvcs