Tutorial 10: Importing custom geographic data into the CleverMaps

CleverMaps provides many ready-to-use geographic dimensions such as administrative units or H3 grids. But sometimes you may need to use your own geographic data - e.g. road segments, buildings or sales areas. This tutorial describes how to import such a custom geographic data into the CleverMaps.

CleverMaps uses vector tiles technology to render geographic data on a map. Currently we use Mapbox as a backend service for hosting and serving vector tiles but other technologies can be also used (e.g. MapTiler). Some further information about vector tiles can be found here https://docs.mapbox.com/vector-tiles/reference/. The tutorial below assumes that Mapbox is used as a backend service. Mapbox has very generous free pricing plan and it should be enough for many use cases.

To transform your geographic data (SHP, GeoJSON, CSV, …) into the CleverMaps you typically need to:

  1. create vector tileset at Mapbox

  2. create datasets in CleverMaps:

    • vector tileset dataset - it only references vector tileset from Mapbox over URL

    • geometryPolygon or geometryLine dataset - it holds all columns which should be visible in CleverMaps (e.g. road class, building type, sales area name, ...) plus some system columns (primary key, bounding box coordinates)

More information about CleverMaps datasets types can be found here https://clevermaps-internal.atlassian.net/wiki/spaces/CDD/pages/7536876

1. Creating vector tileset at Mapbox

You have two options for creating a vector tiles from your geodata files (SHP, GeoJSON, CSV…) - using Mapbox Studio or CleverMaps tool MapboxUtils.

Using Mapbox Studio

Using CleverMaps tool MapboxUtils

Things to keep in mind:

  • Data has to be in WGS84 coordinate system.

  • Mapbox pricing depends on vector tiles resolution level - you pay more for hosting and processing of vector tiles with 1 meter resolution then for 10 meter resolution. The resolution level is derived from maximum zoom level (this can be set while creating vector tiles with MapboxUtils):

    • resolution 10 m = maximum zoom between 6 and 10

    • resolution 1 m = maximum between 11 and 13

    • resolution 30 cm = maximum zoom between 14 and 16

  • Vector tiles supports only simple geometries like Line and Polygon.

2. Creating datasets in CleverMaps

Now we need to create some tables and metadata JSON files in CleverMaps. As described earlier we need to create two datasets at CleverMaps:

  • vector tile dataset (vt dataset)

  • datawarehouse dataset (dwh dataset) with subtype geometryPolygon or geometryLine

To create these two datasets please follow the instructions here https://clevermaps-internal.atlassian.net/wiki/spaces/CDD/pages/7536876. Some more things to keep in mind:

  • the dwh dataset must contain primary key column with the same name as the Mapbox vector tileset (as the nuts0_code in the screenshot below)

  • the dwh dataset must contain the bounding box coordinates columns x_min, x_max, y_min, y_max for each geometry feature (road, building, sales area, ..) - you can calculate it using some standard GIS tool or you can use CleverMaps tool SpatialUtils https://clevermaps-internal.atlassian.net/wiki/spaces/CDD/pages/7537158

  • the dwh dataset can contain any other columns from your original source geodata (except geometry column)

  • the name of the vt dataset needs to be same as the layer name in Mapbox (as the eu_nuts0_vt-84hkkq in the screenshot below)

  • the vt dataset should only contain primary key field and geometry, other columns should be stored only in dwh dataset

  • the data type of primary key of dwh dataset has to be same as in vector tileset Mapbox

  • create default public token at Mapbox Studio and place it into the key urlTemplate instead of placeholder {token} in the vt dataset JSON file