Question 1

How to convert GeoJSON to WKT in Elixir using Geo?

Accepted Answer

First, decode the GeoJSON map with Geo.JSON.decode, then encode the resulting Geo struct to WKT using Geo.WKT.encode!. The README provides examples showing this two-step process with JSON parsing handled separately.

Question 2

Geo vs topo for Elixir geospatial processing?

Accepted Answer

Geo is for format conversions between WKT, WKB, and GeoJSON, while topo handles spatial calculations like distances and intersections. Use Geo for data interoperability and topo for analytical operations, as noted in the README.

Question 3

Does Geo support 3D geometries like PointZ?

Accepted Answer

Yes, Geo supports Z and M coordinates, as listed in the geometry types including PointZ, LineStringZ, and MultiPolygonZ, allowing handling of 3D spatial data with SRID support.

Question 4

How to handle SRID in Geo for spatial reference systems?

Accepted Answer

Geo supports SRID through EWKT and EWKB formats; use decode functions with SRID prefixes (e.g., 'SRID=4326;POINT(...)') to include spatial reference info, as demonstrated in the WKT encoding examples.

Question 5

Is Geo suitable for real-time geospatial applications?

Accepted Answer

For basic format conversions, yes, but for heavy real-time computations, its pure Elixir nature may introduce performance overhead compared to optimized native libraries, so benchmark for your use case.

Question 6

Can I use Geo with PostGIS in Elixir?

Accepted Answer

Yes, but indirectly; use the geo_postgis extension for Postgrex to integrate with PostGIS, while Geo handles conversions between Elixir structs and GIS formats for in-memory processing.

geo

What is geo?

Overview

Use Cases

Best For

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Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions