gdaltips

The Geospatial Data Abstraction Library (GDAL) is a computer software library for reading and writing raster and vector geospatial data formats. #tips #tricks

[Ujaval Gandhi @spatialthoughts]

My "Mastering #GDAL Tools" course is now available on YouTube! This course is the result of my 20 years of experience processing large volumes of imagery and building data pipelines. Check out the playlist at https://t.co/B54RUesTWo . More in the thread below (1/n)

[gdal org @GdalOrg]

GDAL 3.6.1 is released: https://t.co/oLWhbDjbgI . Users of 3.6.0 *should* migrate to 3.6.1 to avoid a potential corruption of the spatial index of GeoPackage files generated by 3.6.0

[gdaltips @gdaltips]

You have a look at this great tutorial about @gdalorg tools https://t.co/ubfIxCl0tg

Put together by @spatialthoughts Ujaval Gandhi

[Diego Alonso Ramos @dalonsoramos]

.@MappingGIS En este artículo te presentamos las 30 aplicaciones #GIS #OpenSource que debes de conocer
https://t.co/Hz6pNfJrK0

[gdaltips @gdaltips]

Big push for the #MapServer !

[Jeff McKenna @mapserving]

Oh so close now! Proud to help announce the massive MapServer 8.0.0-rc2 release today. Announcement: https://t.co/E6Nk7clvxa #foss4g #ribbon #sharing

[gdaltips @gdaltips]

You can also reach to feature of certain index using standard @Python list
indexing

[gdaltips @gdaltips]

@wrenoud @doublebyte @howardbutler @JachymCepicky @STACspec @petegadomski @GdalOrg Is this the future?!

[gdal org @GdalOrg]

GDAL 3.5.2 release candidate available for your testing: https://t.co/nL70jSDY7F

[gdaltips @gdaltips]

oh ...

outputdir/output-file-{X}-{Y}.gpkg is better

ogr2ogr will not create just files in the output directory

sorry for that

[gdaltips @gdaltips]

Just needed to cut big vector dataset into smaller chunks.

With some 🐍 code and dirty ogr2ogr call from the subprocess module, you can put together several

ogr2ogr -clipsrc 0 0 100 100 output_dir input_file.gpkg -nlt MULTILINESTRING

Change the -clipsrc values and repeat

[gdaltips @gdaltips]

You can also loop through all features using simple `for` loop. #fiona converts
input featurs in to the @GeoJSON structure, so accessing it's properties is
easy

feature["properties"]["name"]

[gdaltips @gdaltips]

@STACspec was resonating during #FOSS4G2022 a lot! Great to see @gdalorg to support it more!

[@[email protected] @howardbutler]

Hey @STACspec curious folks! @petegadomski is adding STAC output of the @GdalOrg `gdalinfo -json` command https://t.co/IHZ8b8WfY2 which was an idea hatched at #FOSS4G2022 because good things happen when people meet in person 🙂

[gdaltips @gdaltips]

The data source behaves like list of features. You need just number of features?
Simply use `len()` function

[gdaltips @gdaltips]

All important datasource attributes are stored in `meta` attributes - including name, file name,
coordinate reference system and attribute schema.

(used along with json.dumps( ...., indent=4) for better readability)

[gdaltips @gdaltips]

I love the way, #fiona is done: you just `https://t.co/EddGcQhGML()` the dataset and can use the
code block to close it automatically.

if you `dir()` the data source, you can see all the object attributes.

with https://t.co/EddGcQhGML("dataset.gpkg") as ds:
print(dir(ds))

[gdaltips @gdaltips]

Big thanks for promoting @python and #geospatial 🐍🗺️

[@[email protected] @tomkralidis]

FOSS4G redux: "Doing Geospatial in Python" final v1.0 materials at https://t.co/EYebOQA5KG https://t.co/w1bKS5z4CI #foss4g #foss4g2022

[michael_smith @michael_smith]

State of PDAL talk from FOSS4G2022 - Slides: https://t.co/gVrx8peCgk

[gdal org @GdalOrg]

Slides of "State of GDAL" talk given last week at #FOSS4G2022 available at https://t.co/cseZ8QTMgg

[gdaltips @gdaltips]

You can use @gdalorg @python bindings, but writing code using #GDAL is like writing C++ code using pythonish syntax - not very python.

But there is #fiona library for basic vector file manipulation.

pip install fiona

docs: https://t.co/3cCQWkhjcF

file: https://t.co/V4Rp9GDzBM