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Searches and resolves UK administrative boundaries, including point lookups, metadata, bounding boxes, and GeoJSON geometries.
功能
工具
7
工具
find_boundaries_at_point
Find all UK administrative boundaries that geographically contain a coordinate point.
Use this to answer "what county/borough/ward is this location in?" for a
latitude/longitude. Returns lightweight metadata only â no geometry. If you
need to display a boundary shape, call get_boundary_geojson_by_code() with
the returned `code`.
Multiple boundaries at different administrative levels typically contain the
same point (e.g. a ward, a borough, and a county). Filter by boundary_types
to restrict which levels are returned.
Call list_boundary_type_codes() first if you are unsure which type codes to use.
输入模式
{'type': 'object', 'required': ['lat', 'lng'], 'properties': {'lat': {'type': 'number', 'description': 'Latitude in decimal degrees. Must be between -90 and 90.\n Example: 51.5074 (central London).'}, 'lng': {'type': 'number', 'description': 'Longitude in decimal degrees. Must be between -180 and 180.\n Example: -0.1278 (central London).'}, 'boundary_types': {'anyOf': [{'type': 'array', 'items': {'type': 'string'}}, {'type': 'null'}], 'default': None, 'description': 'Optional list of type codes to restrict results,\n e.g. ["CTY", "LBO"]. All levels are returned if omitted.'}}, 'additionalProperties': False}
输出模式
{'type': 'object', 'required': ['result'], 'properties': {'result': {'type': 'array', 'items': {'type': 'object', 'additionalProperties': True}}}, 'x-fastmcp-wrap-result': True}
get_boundary_bbox
Get the bounding box and centroid for a boundary by its ONS census code.
Returns min_lat, max_lat, min_lng, max_lng, centroid_lat, centroid_lng.
Pass the bbox values directly to Knotsure's sightings_in_bbox() or
geographic_summary(). Much cheaper than get_boundary_geojson_by_code() for
spatial queries because no geometry is fetched or serialised.
输入模式
{'type': 'object', 'required': ['code'], 'properties': {'code': {'type': 'string', 'description': 'ONS census / GSS / LAU code, e.g. "E14001592" for Woking.\n Case-insensitive.'}}, 'additionalProperties': False}
输出模式
{'type': 'object', 'required': ['result'], 'properties': {'result': {'anyOf': [{'type': 'object', 'additionalProperties': True}, {'type': 'null'}]}}, 'x-fastmcp-wrap-result': True}
get_boundary_by_code
Look up metadata for a single UK boundary by its ONS census code. No geometry.
Use this when you already have a census code (e.g. from
search_boundaries_by_name() or find_boundaries_at_point()) and need
structured metadata such as area size or type label. If you also need the
boundary shape for display or analysis, call get_boundary_geojson_by_code()
instead.
ONS census codes (sometimes called GSS codes or LAU codes) are stable
identifiers of the form "E09000012" (Hackney), "E10000016" (Kent), etc.
The first letter indicates the country: E = England, W = Wales,
S = Scotland, N = Northern Ireland.
输入模式
{'type': 'object', 'required': ['code'], 'properties': {'code': {'type': 'string', 'description': 'ONS census / GSS / LAU code, e.g. "E09000012".\n Case-insensitive â\x80\x94 "e09000012" resolves to the same boundary.'}}, 'additionalProperties': False}
输出模式
{'type': 'object', 'required': ['result'], 'properties': {'result': {'anyOf': [{'type': 'object', 'additionalProperties': True}, {'type': 'null'}]}}, 'x-fastmcp-wrap-result': True}
get_boundary_geojson_by_code
Fetch the full GeoJSON geometry for a UK boundary by its ONS census code.
Returns a GeoJSON Feature object (WGS-84 / EPSG:4326) suitable for
rendering on a map or performing geometric analysis. The geometry can be
large â county and ceremonial county polygons are especially heavy. Only
call this when you specifically need the shape; for metadata only use
get_boundary_by_code() instead.
IMPORTANT â Leaflet / web maps: use get_boundary_geojson_simplified() instead.
The full geometry is large enough to exhaust your context window before you can
finish writing the page. The simplified version is safe to embed directly in HTML
and indistinguishable from the full shape at normal map zoom levels.
Use this tool only when you need full-fidelity geometry for server-side analysis
(e.g. precise point-in-polygon checks, area calculations, clipping).
Obtain the census code from search_boundaries_by_name() or
find_boundaries_at_point() before calling this.
输入模式
{'type': 'object', 'required': ['code'], 'properties': {'code': {'type': 'string', 'description': 'ONS census / GSS / LAU code, e.g. "E09000012" for Hackney.\n Case-insensitive.'}}, 'additionalProperties': False}
输出模式
{'type': 'object', 'required': ['result'], 'properties': {'result': {'anyOf': [{'type': 'object', 'additionalProperties': True}, {'type': 'null'}]}}, 'x-fastmcp-wrap-result': True}
get_boundary_geojson_simplified
Fetch simplified GeoJSON for a boundary by its ONS census code.
Safe to embed directly in generated HTML map files. At the default tolerance
(0.0001°) a constituency polygon shrinks from ~4,000 vertices to ~200â400
with no visible difference at normal map zoom levels.
Prefer this over get_boundary_geojson_by_code() when writing Leaflet map
pages â the full geometry is large enough to exhaust your context window
before you can finish writing the HTML.
输入模式
{'type': 'object', 'required': ['code'], 'properties': {'code': {'type': 'string', 'description': 'ONS census / GSS / LAU code, e.g. "E14001592" for Woking.\n Case-insensitive.'}, 'tolerance': {'type': 'number', 'default': 0.0001, 'description': 'Simplification tolerance in degrees (WGS-84). Default 0.0001.\n Increase to 0.001 for county-scale boundaries.'}}, 'additionalProperties': False}
输出模式
{'type': 'object', 'required': ['result'], 'properties': {'result': {'anyOf': [{'type': 'object', 'additionalProperties': True}, {'type': 'null'}]}}, 'x-fastmcp-wrap-result': True}
list_boundary_type_codes
Returns every valid UK boundary type code mapped to its human-readable label.
Call this before using any tool that accepts a `boundary_type` or
`boundary_types` argument so you know which codes are legal. Passing an
unlisted code to another tool raises a ValueError.
Boundary type codes are stable Ordnance Survey identifiers. Common ones:
- "CTY" â County
- "LBO" â London Borough
- "UTA" â Unitary Authority
- "MTD" â Metropolitan District
- "DIS" â District
- "DIW" â District Ward
- "CCTY" â Ceremonial County
- "HCTY" â Historic County
- "WMC" â Westminster Parliamentary Constituency
- "GLC" â Greater London Constituency
- "SWC" â Scotland/Wales Constituency
- "PAR" â Parish
- "CED" â County Electoral Division
Returns:
Dict mapping code â label for all supported boundary types,
e.g. {"CTY": "County", "LBO": "London Borough", ...}
输入模式
{'type': 'object', 'properties': {}, 'additionalProperties': False}
输出模式
{'type': 'object', 'additionalProperties': {'type': 'string'}}
search_boundaries_by_name
Search for UK administrative boundaries by name (case-insensitive partial match).
Use this to discover boundaries when you have a place name but not a code.
Returns lightweight metadata only â no geometry. If you need to display or
analyse the boundary shape, call get_boundary_geojson_by_code() with the
returned `code`.
Call list_boundary_type_codes() first if you need to filter by type and are
unsure which code to use.
输入模式
{'type': 'object', 'required': ['name'], 'properties': {'name': {'type': 'string', 'description': 'Full or partial boundary name. Case-insensitive. Examples:\n "Hackney", "Greater Manchester", "York", "Kent".'}, 'boundary_type': {'anyOf': [{'type': 'string'}, {'type': 'null'}], 'default': None, 'description': 'Optional type code to narrow results, e.g. "LBO" for\n London Boroughs or "CTY" for Counties. Must be a code\n from list_boundary_type_codes(); raises ValueError otherwise.'}}, 'additionalProperties': False}
输出模式
{'type': 'object', 'required': ['result'], 'properties': {'result': {'type': 'array', 'items': {'type': 'object', 'additionalProperties': True}}}, 'x-fastmcp-wrap-result': True}
历史
近期工具变更
已添加
get_boundary_bbox
2026年9月17日 12:41
已添加
get_boundary_geojson_simplified
2026年9月17日 12:41
已添加
get_boundary_geojson_by_code
2026年9月17日 12:41
已添加
get_boundary_by_code
2026年9月17日 12:41
已添加
find_boundaries_at_point
2026年9月17日 12:41
已添加
search_boundaries_by_name
2026年9月17日 12:41
已添加
list_boundary_type_codes
2026年9月17日 12:41
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