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A basic Open-source Carte internationale du Monde au Millionième nomenclature encoder.

Project description

Pymil is a simple Carte internationale du Monde au Millionième nomenclature coder. You might find it useful for searching maps for a specific coordinate pair.

usage: pymil.py [-h] [–geojson] [–scale SCALE] latitude longitude

calculates CIM code for given coordinate pair.

positional arguments:

latitude longitude

optional arguments:
-h, --help

show this help message and exit

--geojson

prints geoJSON of the map area instead of the code.

--scale SCALE

scale to be encoded, defaults to 1:25.000.

CIM

The CIM uses the geographic coordinate system as background for the Earth separation, each individual chart receives a code that is composed by two letters and a number. The two letters represent respectively the hemisphere (north or south) and a interval of 4° in Earth’s latitude, which follow the alphabetical order starting from the Equator and increasing to the poles. The number represents a interval of 6° in longitude, marked with numbers and starting in the 180° meridian.

The letters that follow this are subdivisions of the basic millionth chart and indicates charts in scales 1 to 500,000, 250,000, 100,000, 50,000 and 25,000. The letter/number used in each part of the code deppends on the relative position of the chart to its smaller scale counterpar.

TODO

  • Make better docs.

__geo_interface__

The class CIM includes a __geo_interface__, as defined in https://gist.github.com/sgillies/2217756

Thanks

  • Luis Urtiga for the CIM nomenclature explanation.

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