https://github.com/brycejohnston/ex_pyshp
Read and write shapefiles using pyshp from Elixir
https://github.com/brycejohnston/ex_pyshp
elixir pyshp pythonx shapefile
Last synced: 6 months ago
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Read and write shapefiles using pyshp from Elixir
- Host: GitHub
- URL: https://github.com/brycejohnston/ex_pyshp
- Owner: brycejohnston
- License: mit
- Created: 2025-03-26T19:28:33.000Z (6 months ago)
- Default Branch: master
- Last Pushed: 2025-03-26T19:54:29.000Z (6 months ago)
- Last Synced: 2025-03-26T20:43:47.396Z (6 months ago)
- Topics: elixir, pyshp, pythonx, shapefile
- Language: Elixir
- Homepage:
- Size: 6.84 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# ExPyshp
Read and write shapefiles using [pyshp](https://github.com/GeospatialPython/pyshp) from Elixir with [pythonx](https://github.com/livebook-dev/pythonx).
## Installation
If [available in Hex](https://hex.pm/docs/publish), the package can be installed
by adding `ex_pyshp` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:ex_pyshp, "~> 0.1.0"}
]
end
```
## Usage
### Reading
```elixir
# Extract from the ZIP file and get list of files
extraction_result = ExPyshp.extract("shp.zip")
# Process the extraction result and read each shapefile group
shapefile_results =
case extraction_result do
{:ok, shapefile_pairs} ->
# For each shapefile group, call read and capture the result in a list
Enum.map(shapefile_pairs, fn %{shp: shp_path, dbf: dbf_path, shx: shx_path} ->
case ExPyshp.read(shp_path, dbf_path, shx_path) do
{:ok, base_name, data} -> {:ok, base_name, data}
{:error, base_name, reason} -> {:error, base_name, reason}
end
end)
{:error, reason} ->
IO.puts("Error extracting shapefiles: #{reason}")
[]
end
# Process and inspect each result:
Enum.each(shapefile_results, fn
{:ok, base_name, shapefile_data} ->
IO.inspect(shapefile_data, label: "Shapefile data from #{base_name}")
{:error, base_name, reason} ->
IO.puts("Error reading shapefile for #{base_name}: #{reason}")
end)
```
### Writing
```elixir
data = [
%{
"record" => %{"name" => "Feature1", "value" => 123},
"geometry" => %Geo.Point{coordinates: {1.0, 2.0}}
},
%{
"record" => %{"name" => "Feature2", "value" => 456},
"geometry" => %Geo.Point{coordinates: {3.0, 4.0}}
}
]
ExPyshp.write("output_path", "name", data)
```