Add vision to README

README.md

@@ -1,11 +1,21 @@
 ## Vector Data Source
 
+*This is a work in progress towards OSM2VectorTiles v3.0*
+
 This is the data source for the vector tile schema of OSM2VectorTiles.
 It contains the *tm2source* project and the required database schema (views, functions).
 
 The vector data sources stands as separate repository to foster collaboration with Wikipedia
 and make it easier to fork the style without forking OSM2VectorTiles as well.
 
+## Vision
+
+The vector tile schema will contain the necessary features for creating a basemap.
+We will orient ourselves on the cartography used in the [Carto Basemaps](https://carto.com/location-data-services/basemaps/).
+Additional layers can be always be mixed in later on but we think OSM2VectorTiles should become less bloated in v3.0.
+
+![Future basemaps based on OSM2VectorTiles v3.0?](./basemap_vision.png)
+
 ## Requirements
 
 This vector tile schema depends on a database containing several different data sources
@@ -24,3 +34,45 @@ The vector data source is using zoom level views for each layer and contains use
 The PostgreSQL code can be found in `sql`.
 
 *TODO: Write import container*
+
+## Develop
+
+To work on *osm2vectortiles.tm2source* we recommend using Docker.
+
+- Install [Docker](https://docs.docker.com/engine/installation/)
+- Install [Docker Compose](https://docs.docker.com/compose/install/)
+
+### Prepare the Database
+
+Now start up the database container.
+
+```bash
+docker-compose up -d postgres`
+```
+
+Import water from [OpenStreetMapData](http://openstreetmapdata.com/).
+
+```bash
+docker-compose run import-water
+```
+
+Import [Natural Earth](http://www.naturalearthdata.com/) data.
+
+```bash
+docker-compose run import-natural-earth
+```
+
+### Work on Schema
+
+Run the `db-schema` container each time you modify SQL code inside `./schema`.
+
+```bash
+docker-compose run db-schema
+```
+
+To work on the *data.yml* you can start up Mapbox Studio Classic in a container
+and visit `localhost:3000` and open the vector source project under `projects/osm2vectortiles.tm2source`.
+
+```bash
+docker-compose up mapbox-studio
+```