pinpointer

Gets provinces and countries from latitudes and longitudes.

Installation:

From source:

You will need to install Rust in order to install this program from source. After installing Rust, installation is simply: cargo install pinpointer

Usage

Library:

The main feature of this library is the LabeledPartitionTree, which can be used to perform fast point-in-region queries. A LabeledPartitionTree can be built from a mapping from labels to polygons with those labels.

This library provides some helper functions to make it easy to get map data and build label trees to perform point-in-country and point-in-province queries. See the examples folder for full code examples for downloading data, computing the label trees, and finally performing millions of point-in-country/point-in-province lookups.

Demo server:

You can also run a local demo server on port 8000 by running the pinpointer command after installation. On startup, the server will download country and province data to the data directory and compute depth 6 label trees for both. The server exposes two endpoints, /lat_lon_to_country and /lat_lon_to_province, which take lat and lon query arguments and return a country or province code, respectively. If the lat/lon pair does not fall within any country, the endpoints return "-99" instead.

Here are some example requests to the server: ``` curl http://localhost:8000/latlonto_country?lat=10&lon=20

TD

curl http://localhost:8000/latlonto_province?lat=10&lon=20

TD-SA

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