her_search_aerial
Search aerial investigation mapping data to find archaeological features like cropmarks, earthworks, and enclosures, complementing NHLE records.
Instructions
Search aerial investigation mapping data for archaeological features.
Queries Historic England AIM data for features identified from aerial photographs and LiDAR. Includes cropmarks, earthworks, enclosures, ring ditches, saltern mounds, and other features not in the NHLE.
Args: monument_type: Monument type keyword (e.g. "SALTERN MOUND", "ENCLOSURE") period: Period filter (e.g. "IRON AGE", "ROMAN", "MEDIEVAL") bbox: Bounding box as "xmin,ymin,xmax,ymax" in BNG (EPSG:27700) lat: WGS84 latitude for radius search lon: WGS84 longitude for radius search radius_m: Search radius in metres (requires lat/lon) max_results: Maximum results (1-2000, default 50) offset: Pagination offset output_mode: Response format — "json" (default) or "text"
Returns: Matching aerial mapping features with monument type, period, evidence
Tips for LLMs: Use monument_type and period as uppercase keywords matching the AIM vocabulary. Key monument types: "SALTERN MOUND" or "RED HILL" for salt-production mounds, "ENCLOSURE" for prehistoric/Roman enclosures, "RING DITCH" for barrow ditches, "EARTHWORK" for general earthworks, "FIELD SYSTEM" for field boundaries. Periods: "IRON AGE", "ROMAN", "MEDIEVAL". These features are NOT in the NHLE — they complement her_search_monuments. For comprehensive area surveys, run all three sources: her_search_monuments (NHLE designated), her_search_aerial (AIM cropmarks/earthworks), and her_search_heritage_gateway (local HER undesignated sites), then merge and deduplicate the results. Use her_map to display the combined results on a map.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| lat | No | ||
| lon | No | ||
| bbox | No | ||
| offset | No | ||
| period | No | ||
| radius_m | No | ||
| max_results | No | ||
| output_mode | No | json | |
| monument_type | No |