About this data
Every dataset here is summarized on the same grid, so a single cell can be read across vegetation, citizen-science records and review priority. The grid is NatureServe's nested hexagon system: a one square mile hexagon, a cluster of seven hexagons (7 sq mi), and a cluster of seven clusters (49 sq mi). Cell IDs are the NatureServe IDs, so the numbers here join back to the source tables.
What each layer is
| Layer | Source | Keep in mind |
|---|
| Vegetation | NPS vegetation map for the A.T., by mapped vegetation type | The map stops at the edge of the surveyed lands, so most cells are only partly covered. |
| iNaturalist | Research-grade records, | Records follow people. Few records means few visits, not few species. |
| eBird | Checklists, | Same caution. Thinly sampled cells are faded on the bird maps. |
| Review priority | Rare species priority zones | Shown at 7 and 49 sq mi only. A screening aid, not a survey result. |
Reading the maps
- Filled cells have data for the measure on screen. Outlined cells have data in another layer but none for this measure.
- Colors are five equal-count classes of the cells with data at the cell size on screen, so the classes change when you change cell size.
- The strip under the map runs from Springer Mountain to Katahdin. Each bar is a ten-mile stretch, averaged from the 49 sq mi cells.
- Species names link to Wikipedia, looked up by scientific name. A name with no article of its own opens a Wikipedia search instead.
- Trail miles are measured along the mapped centerline and are approximate.
Updates
iNaturalist and eBird summaries are refreshed quarterly. This page shows the run.