<!--header-start-->
<picture>
<source media="(prefers-color-scheme: dark)" srcset="https://data.nhm.ac.uk/images/nhm_logo.svg">
<source media="(prefers-color-scheme: light)" srcset="https://data.nhm.ac.uk/images/nhm_logo_black.svg">
<img alt="The Natural History Museum logo." src="https://data.nhm.ac.uk/images/nhm_logo_black.svg" align="left" width="150px" height="100px" hspace="40">
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# ckanext-versioned-tiledmap
[](https://github.com/NaturalHistoryMuseum/ckanext-versioned-tiledmap/actions/workflows/tests.yml)
[](https://coveralls.io/github/NaturalHistoryMuseum/ckanext-versioned-tiledmap)
[](https://github.com/ckan/ckan)
[](https://www.python.org/)
[](https://ckanext-versioned-tiledmap.readthedocs.io)
_A CKAN extension with a map view for versioned-datastore backed resources._
<!--header-end-->
# Overview
<!--overview-start-->
A CKAN plugin with a map view for versioned-datastore backed resources allowing for map visualizations of large resources with millions of data points.
This repository is a fork* of [ckanext-map](https://github.com/NaturalHistoryMuseum/ckanext-map).
_*you can't fork repositories within the same organisation, so this repository is a duplicate of ckanext-map._
<!--overview-end-->
# Installation
<!--installation-start-->
Path variables used below:
- `$INSTALL_FOLDER` (i.e. where CKAN is installed), e.g. `/usr/lib/ckan/default`
- `$CONFIG_FILE`, e.g. `/etc/ckan/default/development.ini`
## Pre-install setup
This extension depends on the following projects, which must be installed _first_:
- [versioned-datastore-tile-server](https://github.com/NaturalHistoryMuseum/versioned-datastore-tile-server)
## Installing from PyPI
```shell
pip install ckanext-versioned-tiledmap
```
## Installing from source
1. Clone the repository into the `src` folder:
```shell
cd $INSTALL_FOLDER/src
git clone https://github.com/NaturalHistoryMuseum/ckanext-versioned-tiledmap.git
```
2. Activate the virtual env:
```shell
. $INSTALL_FOLDER/bin/activate
```
3. Install via pip:
```shell
pip install $INSTALL_FOLDER/src/ckanext-versioned-tiledmap
```
### Installing in editable mode
Installing from a `pyproject.toml` in editable mode (i.e. `pip install -e`) requires `setuptools>=64`; however, CKAN 2.9 requires `setuptools==44.1.0`. See [our CKAN fork](https://github.com/NaturalHistoryMuseum/ckan) for a version of v2.9 that uses an updated setuptools if this functionality is something you need.
## Post-install setup
1. Add 'versioned_tiledmap' to the list of plugins in your `$CONFIG_FILE`:
```ini
ckan.plugins = ... versioned_tiledmap
```
2. Install `lessc` globally:
```shell
npm install -g "less@~4.1"
```
3. Add latitude and longitude fields for the resources you want to use this view for.
<!--installation-end-->
# Configuration
<!--configuration-start-->
These are the options that can be specified in your .ini config file.
| Name | Description | Default |
|---------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------|
| `versioned_tilemap.tile_layer.url` | The URL to use for the base world tiles | `https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png` |
| `versioned_tilemap.tile_layer.attribution` | The attribution text to show for this layer (can be HTML) | `Base tiles provided by OpenStreetMap. <a href="openstreetmap.org/copyright">View copyright information</a>` |
| `versioned_tilemap.tile_layer.opacity` | The opacity for the tile layer | `0.8` |
| `versioned_tilemap.zoom_bounds.min` | Minimum zoom level for initial display of the resource's data | `3` |
| `versioned_tilemap.zoom_bounds.max` | Maximum zoom level for initial display of the resource's data | `18` |
| `versioned_tilemap.style.plot.point_radius` | The integer radius of the rendered points (including the border) | `4` |
| `versioned_tilemap.style.plot.point_colour` | The hex value to render the points in | `#ee0000`  |
| `versioned_tilemap.style.plot.border_width` | The integer border width of the rendered points | `1` |
| `versioned_tilemap.style.plot.border_colour` | The hex value to render the borders of the points in | `#ffffff`  |
| `versioned_tilemap.style.plot.grid_resolution` | The integer size of the cells in the grid that each tile is split into for the UTFGrid. The default of `4` produces a 64x64 grid within each tile | `4` |
| `versioned_tilemap.style.gridded.cold_colour` | The hex value to be used to render the points with the lowest counts | `#f4f11a`  |
| `versioned_tilemap.style.gridded.hot_colour` | The hex value to be used to render the points with the highest counts | `#f02323`  |
| `versioned_tilemap.style.gridded.range_size` | This many colours will be used to render the points dependant on their counts | `12` |
| `versioned_tilemap.style.gridded.resize_factor` | A resize value to use when smoothing the tile. This value will be used to scale the tile and then down (with anti-aliasing) to produce a smoother output. Increasing this value will negatively impact performance | `4` |
| `versioned_tilemap.style.gridded.grid_resolution` | The integer size of the cells in the grid that each tile is split into. The default of `8` produces a 32x32 grid within each tile and therefore matches the default `grid.json` setting too | `8` |
| `versioned_tilemap.style.heatmap.point_radius` | The integer radius of the rendered points (including the border) | `8` |
| `versioned_tilemap.style.heatmap.cold_colour` | The hex value to be used to render the points with the lowest counts | `#0000ee`  |
| `versioned_tilemap.style.heatmap.hot_colour` | The hex value to be used to render the points with the highest counts | `#ee0000`  |
| `versioned_tilemap.style.heatmap.intensity` | The decimal intensity (between 0 and 1) to render the tile with | `0.5` |
| `versioned_tilemap.info_template` | The name of the template to use when a point is clicked | `point_detail` |
| `versioned_tilemap.quick_info_template` | The name of the template to use when a point is hovered over | `point_detail_hover` |
<!--configuration-end-->
# Usage
<!--usage-start-->
After enabling this extension in the list of plugins, the Map view should become available for resources with latitude and longitude values.
<!--usage-end-->
# Testing
<!--testing-start-->
There is a Docker compose configuration available in this repository to make it easier to run tests. The ckan image uses the Dockerfile in the `docker/` folder.
To run the tests against ckan 2.9.x on Python3:
1. Build the required images:
```shell
docker compose build
```
2. Then run the tests.
The root of the repository is mounted into the ckan container as a volume by the Docker compose
configuration, so you should only need to rebuild the ckan image if you change the extension's
dependencies.
```shell
docker compose run ckan
```
<!--testing-end-->
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Clone the repository into the `src` folder:\n ```shell\n cd $INSTALL_FOLDER/src\n git clone https://github.com/NaturalHistoryMuseum/ckanext-versioned-tiledmap.git\n ```\n\n2. Activate the virtual env:\n ```shell\n . $INSTALL_FOLDER/bin/activate\n ```\n\n3. Install via pip:\n ```shell\n pip install $INSTALL_FOLDER/src/ckanext-versioned-tiledmap\n ```\n\n### Installing in editable mode\n\nInstalling from a `pyproject.toml` in editable mode (i.e. `pip install -e`) requires `setuptools>=64`; however, CKAN 2.9 requires `setuptools==44.1.0`. See [our CKAN fork](https://github.com/NaturalHistoryMuseum/ckan) for a version of v2.9 that uses an updated setuptools if this functionality is something you need.\n\n## Post-install setup\n\n1. Add 'versioned_tiledmap' to the list of plugins in your `$CONFIG_FILE`:\n ```ini\n ckan.plugins = ... versioned_tiledmap\n ```\n\n2. Install `lessc` globally:\n ```shell\n npm install -g \"less@~4.1\"\n ```\n\n3. Add latitude and longitude fields for the resources you want to use this view for.\n\n<!--installation-end-->\n\n# Configuration\n\n<!--configuration-start-->\nThese are the options that can be specified in your .ini config file.\n\n| Name | Description | Default |\n|---------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------|\n| `versioned_tilemap.tile_layer.url` | The URL to use for the base world tiles | `https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png` |\n| `versioned_tilemap.tile_layer.attribution` | The attribution text to show for this layer (can be HTML) | `Base tiles provided by OpenStreetMap. <a href=\"openstreetmap.org/copyright\">View copyright information</a>` |\n| `versioned_tilemap.tile_layer.opacity` | The opacity for the tile layer | `0.8` |\n| `versioned_tilemap.zoom_bounds.min` | Minimum zoom level for initial display of the resource's data | `3` |\n| `versioned_tilemap.zoom_bounds.max` | Maximum zoom level for initial display of the resource's data | `18` |\n| `versioned_tilemap.style.plot.point_radius` | The integer radius of the rendered points (including the border) | `4` |\n| `versioned_tilemap.style.plot.point_colour` | The hex value to render the points in | `#ee0000`  |\n| `versioned_tilemap.style.plot.border_width` | The integer border width of the rendered points | `1` |\n| `versioned_tilemap.style.plot.border_colour` | The hex value to render the borders of the points in | `#ffffff`  |\n| `versioned_tilemap.style.plot.grid_resolution` | The integer size of the cells in the grid that each tile is split into for the UTFGrid. 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