ng-address-resolver
Resolve free-text Nigerian addresses, such as "back of Fabian Hotel, off NTA Road, Ado Ekiti", to NIPOST digital postcodes (NDAPS). It answers only as precisely as the evidence allows, and asks a question when it cannot.
Status: pre-release. The typed-postcode, location-pin and geocoded paths have run against the live NIPOST API and a live geocoder. The Claude reading step is tested only against a mocked API, and accuracy on real addresses is unmeasured.
How it decides
- A postcode written in the text is extracted (never auto-corrected) and confirmed with NIPOST.
- A location pin is reverse-geocoded by NIPOST. This is the only route to a high-confidence building code.
- Text only is read by Claude into street, landmarks and their relation ("behind", "opposite", "at"), area, LGA and state, then placed with a geocoder and reverse-geocoded by NIPOST.
| Evidence | Answer |
|---|---|
| Typed postcode NIPOST confirms, or a pin within 10 m of a building | Building code, high confidence |
| A pin within 25 m, or the landmark the address is | Building code, medium confidence |
| A building near a landmark ("behind", "opposite") | Area code, e.g. EK-01-A03-FK |
| A street only | District code, low confidence |
| A town only, or nothing found | No code, plus a question for the user |
Text alone rarely identifies a building: a landmark's own building is not the one behind it, and a road's map point is not any house on it. Ask users for a location pin when you need the exact building.
Usage
ng-address "back of Fabian Hotel, off NTA Road, Ado Ekiti"
ng-address "my house" --lat 7.6211 --lng 5.2214
The result is JSON: status (resolved, partial, unresolved), code, level, confidence, method, question and the evidence behind it.
from ng_address import Resolver
result = await Resolver(nipost=..., parser=..., geocoder=...).resolve("...")
The core needs no model. Install ng-address-resolver[claude] to let the CLI and ng_address.parse.ClaudeParser read addresses with Claude. A caller that has already read the address, such as the host model of an MCP server, passes its own ParsedAddress as resolve(..., parsed=...) instead.
Configuration
| Variable | Purpose |
|---|---|
| Anthropic credentials | Needs the claude extra. Read by the Anthropic SDK (ANTHROPIC_API_KEY or an ant auth login profile). Without them the raw text is searched instead. |
NG_POSTCODE_API_KEY |
NIPOST API key. Without it no postcode can be returned. |
NG_GEOCODER_URL |
A Nominatim server, ideally your own. |
NG_GEOCODER_CONTACT |
A URL or email sent in the User-Agent to identify you. Required for the public Nominatim. |
NG_ADDRESS_MODEL |
Claude model. Defaults to claude-opus-5-5. |
The public Nominatim at https://nominatim.openstreetmap.org allows light personal use only. A service whose main job is geocoding must run its own instance or use a commercial geocoder. Map data © OpenStreetMap contributors.
Each address uses at most one Claude call at low effort, up to three geocoder searches, and one or two NIPOST calls.
License
MIT
1 maintainer
Metadata
1 maintainer
Release files for ng-address-resolver 0.1.2
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| ng_address_resolver-0.1.2-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 31.1 kB
Release files / ng_address_resolver-0.1.2.tar.gz
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