sehHeiden

sehHeiden

I had a search whether Elixir is able to work with geodata? I currently think, it does not work.

I think mainly about three topics:

  • DB: spartiallite for sqlite, postgis for postgresql
  • vector data: as shape, geopackage, geojson
  • raster data: as geotiff

Perhaps also interesting is whether someone is using web services as wfs, or wms, etc.

Regards.

Showing Posts 1 to 4

LostKobrakai

LostKobrakai

There’s the geo and geo_postgis libraries, which cover many of the things you mentioned. They were recently taken over by the team behind felt, which I guess should be a great showcase for what you can do with elixir and geodata. Never heared of spartiallite before though. Not sure if there’s existing tooling around that.

sehHeiden

sehHeiden OP

Okay, geo seams to be able to decode. The felt website also shows, the usecase of working with shape files.

But I haven’t found the the function to open shape files. The geo package shows encoding, decoding of geojson. But it seams to be possible, or does felt use another stack/programming language? Normally I use geopandas in python, or QGIS for watching the files.
Is there a blog or combined reference/resource for geodata projects?

davidwebster48

davidwebster48

I have successfully read some shape files using ExShape. It doesn’t work for all shapefiles. For shapefiles where it doesn’t work, I use mapshaper.org to convert the shapefile to geojson, then parse it with Geo.JSON

tme_317

tme_317

Usually I load Shapefiles into PostGIS orchestrated by my Elixir app by running shp2pgsql using System.cmd to load the data into PostgreSQL then use it from there. If I need to access the data later in Elixir I would use geo_postgis and Ecto. Or you can use QGIS or hook up a wms/wfs/tile server directly to PostGIS… PostGIS in Action, 3rd ed is a great book on those topics.

Or if you don’t want to store the data in PostGIS you can use ogr2ogr to convert your Shapefiles into GeoJSON then load into Elixir. Or use it to convert to dozens of other formats you mentioned such as Spatialite, GeoPackage, etc. If dealing with rasters I would use the GDAL tools.

— All posts loaded —

Where Next? Top

Trending in Questions Top

itzmidinesh
Hi all, I’m working on a Phoenix project where I need to make external HTTP requests and I’m trying to choose between Req and HTTPoison....
New
yarrichar
I’m very new to Elixir, so sorry if this is a silly question: I am wondering what happens to the mailbox of a process when the machine i...
New
pragdave
How do I tell Hologram not to escape HTML when substituting into templates? {Textile.render(@product.long_description)} escapes the HTM...
New
Fl4m3Ph03n1x
Background When trying to execute mix release on a Windows 11 machine for a Phoenix project I get the following error: * assembling mark...
New
rlipscombe
I’d like to create a file with 600 permissions (rw-------), but there’s a race condition if I create it and then change the permissions. ...
New
saleyn
Is there a way to import record definitions in the iex shell for pretty printing (similar to the rr command in the erl shell)? This woul...
New
rlipscombe
When I use Mix.install with a git dependency, using git@github.com:... how do I change the SSH identity used? I’ve got two Github accoun...
New

Other Trending Topics Top

dominicletz
Hey there, I haven’t seen a list of useful Elixir specific skills for the popular AI tools yet so I’m starting one here with my first. ...
New
raa-ziq
Hi everyone :waving_hand: I wanted to share something I’ve been building — NowBlind, a random chat app designed to help people discover ...
New
mudasobwa
I fully migrated to my own harness from Anthropic/Gemini and I think it’s time to share it. Welcome DSH, the DeepSeek Harness, fully writ...
New
OndrejValenta
(I just needed to vent somewhere and LinkedIn is full of hope, or hype, I’m not sure which exactly) AI dream has many faces, but general...
New
kip
Localize is the next generation localisation library for Elixir. Think of it as ex_cldr version 3.0. The first version will be released ...
New
jimsynz
Beam Bots (or just BB for short) is a framework for building fault-tolerant robotics applications in Elixir using familiar OTP patterns. ...
New

We're in Beta

About us Mission Statement

Options

Thread Display Mode




Thread Preview

Skip Thread Previews