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Created CSV Plugin (markdown)

springmeyer 2012-08-24 10:44:00 -07:00
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_New in Mapnik 2.1_
This plugin can read tabular data with embedded geometries. It auto-detects column types based on common sense type coercion and auto-detects geometry data by looking for header names like `latitude/lat` and `lon/long/lng/longitude` that likely encode point data. It can also handle GeoJSON and WKT encoded geometries and will find these if any column headers are named `geojson` or `wkt` (case-insensitive).
This plugin reads the entire file upon initialization and caches features in memory so it is extremely fast for rendering from after initial startup (for reasonable size files under 5-10 MB).
For more details on the motivations and design of this plugin see: https://github.com/mapnik/mapnik/issues/902