FOSS4G 2021: Kart workshop

.gitignore

workshop
.env

README.md

Kart workshop

Compose set up

• https://kartproject.org/

How to run the image:

• Build the image with docker-compose build
• Test the image with docker-compose up

$ docker-compose up
Starting kart_foss4g_1 ... done
Attaching to kart_foss4g_1
foss4g_1  | Kart v0.10.4, Copyright (c) Kart Contributors
foss4g_1  | » GDAL v3.2.0; PROJ v6.3.0
foss4g_1  | » PyGit2 v1.3.0; Libgit2 v1.1.0; Git v2.29.2
foss4g_1  | » SQLAlchemy v1.4.11; pysqlite3 v2.6.0/v3.31.1; SpatiaLite v5.0.0; Libpq v10.0.12
foss4g_1  | » SpatialIndex v1.9.3
kart_foss4g_1 exited with code 0

• Log into the image with docker-compose run foss4g bash and check the data is available

$ ogrinfo -summary workshop/linz-chatham-islands/building-points-topo.shp building-points-topo
INFO: Open of `workshop/linz-chatham-islands/building-points-topo.shp'
      using driver `ESRI Shapefile' successful.

Layer name: building-points-topo
Geometry: Point
Feature Count: 614
Extent: (-176.828360, -44.337398) - (-176.163149, -43.707973)
Layer SRS WKT:
GEOGCRS["WGS 84",
    DATUM["World Geodetic System 1984",
        ELLIPSOID["WGS 84",6378137,298.257223563,
            LENGTHUNIT["metre",1]]],
    PRIMEM["Greenwich",0,
        ANGLEUNIT["degree",0.0174532925199433]],
    CS[ellipsoidal,2],
        AXIS["latitude",north,
            ORDER[1],
            ANGLEUNIT["degree",0.0174532925199433]],
        AXIS["longitude",east,
            ORDER[2],
            ANGLEUNIT["degree",0.0174532925199433]],
    ID["EPSG",4326]]
Data axis to CRS axis mapping: 2,1
t50_fid: Integer (9.0)
status: String (8.0)
bldg_use: String (21.0)
name_ascii: String (75.0)
macronated: String (1.0)
name: String (75.0)

Notes

• Initialize the repo kart init ./first

• Importing data kart import ${shape_path}

• Check status kart status

• List datasets kart data ls

• A new gpkg file is created

• Add data to the gpkg with QGIS

• Check the status kart status

• Commit changes kart commit "new points"

• Commit a single feature from a layer kart commit building-points-topo:feature:620 -m "single feature commit"

• Restore to the last commit status kart restore

• Checkout a specific commit kart checkout ${commit_id}

• Go back to the last commit kart checkout main

• Clone a repo kart clone kart@foss4g-2021.kartproject.org:second

• Create a branch kart branch jsanz

• Switch to a branch kart switch branch

• Get diffs with a branch:

  • Simple kart diff main..
  • As JSON kart diff main.. -o json
  • As HTML kart diff main.. -o html --crs "EPSG:4326"
  • Just the feature count kart diff main.. --only-feature-count exact

• Merge conflicts with our changes kart resolve --with ours island-polygons-topo:feature:178

docker-compose.yml

version: '3.7'
services:
  foss4g:
    build:
      context: .
    volumes:
      - ./workshop:/home/foss4g/workshop
      - ${SECRET_KEY}:/home/foss4g/.ssh/id_rsa
      - ${PUBLIC_KEY}:/home/foss4g/.ssh/id_rsa.pub
    networks:
      - foss4g

networks:
  foss4g:
    name: foss4g

Dockerfile

FROM debian:bullseye-slim as foss4g

USER root

# Prepare the image with some usual tools
RUN bash -c "set -eux ;\
    apt-get -qq update ;\
    DEBIAN_FRONTEND=noninteractive apt-get -y install \
        jq \
        git \
        vim \
        tree \
        curl \
        sudo \
        unzip \
        gdal-bin;\
    useradd -ms /bin/bash foss4g;\
    echo 'foss4g:foss4g' | chpasswd;\
    usermod -aG sudo foss4g"

FROM foss4g as kart

# Kart installation
RUN bash -c "set -eux ;\
    curl -Lo /tmp/kart.deb \
        https://github.com/koordinates/kart/releases/download/v0.10.4/kart_0.10.4-1_amd64.deb; \
    apt install -y /tmp/kart.deb"

USER foss4g

WORKDIR /home/foss4g

# Download data
RUN bash -c "set -eux ;\
    mkdir -p /home/foss4g/workshop/;\
    mkdir -p /home/foss4g/.ssh ;\
    cd /home/foss4g/workshop/;\
    curl -Lo data.zip http://foss4g-2021.kartproject.org/static/linz-chatham-islands.zip; \
    unzip data.zip"

RUN bash -c "set -eux ;\
    git config --global user.email \"nobody@nobody.co\";\
    git config --global user.name \"FOSS4G Dummy user\""

CMD [ "kart", "--version" ]