Layered City Map: Buildings, Roads, Water and Greenery on Separate Layers
A flat picture of a city is fine for a quick illustration, but most design work needs control: a different colour for water, thinner streets, buildings switched off for a cleaner poster. That is only practical when the map arrives split into layers. This guide shows how to get a layered city map from OpenStreetMap data and what to do with the layers once the file is open in your editor.
What "layered" means here
In a layered export every kind of map object sits in its own named group: roads in one, buildings in another, then water, greenery and so on. You can hide a group, lock it, recolour everything in it at once or move it to another document. The SVG export arrives split this way - roads, buildings, water and greenery are separate named groups - and so does the CDR file for CorelDRAW, where layers come as separate named groups in the map's language.
Step 1. Select the area in the map builder
Open the map builder and draw a rectangle around the part of the city you need: zoom with the mouse wheel, drag to move, then press and drag to outline the area. A smaller area exports faster and keeps more detail - a single district takes seconds, a whole city can take several minutes.
Step 2. Pick a map style and level of detail
The style sets the colours and line weights of the exported drawing. Minimal gives a clean base that is easy to restyle, blueprint gives a ready drawing look, and there are other styles such as standard and neon. The level of detail ranges from an overview (major roads only) to maximum (every building and footpath); the builder suggests a sensible level for the size of the area. You can also choose the sheet format: A4, A3 or custom.
Step 3. Choose a format that keeps the layers
- SVG - open and universal: Illustrator, Inkscape, Affinity Designer and Figma all read it, and the groups survive the import.
- CDR - a native CorelDRAW file that opens with a double click; layers arrive as named groups and labels stay editable text.
- PDF, AI and EPS - good for handing over to a print shop or placing in a layout. The AI export is a single artboard with paths, fills and editable text, so if you need layers there, build them yourself (see below).
Step 4. Open the file and check the groups
In Illustrator or Inkscape open the Layers panel; in CorelDRAW open the Objects docker. You should see one group per kind of object. Collapse everything, then expand only the group you are working on - a city district easily holds thousands of shapes, and a collapsed tree keeps the editor responsive.
Step 5. Work with the layers
- Recolour by layer. Select a whole group and change its fill or stroke in one action: blue for water, a muted green for parks, a light grey for buildings.
- Simplify the poster. Hide buildings and minor paths and leave only the street network and water - the classic minimalist city print.
- Separate for print. Keep the layers that go to different inks or finishes (for example a spot colour or varnish) as separate groups, so the print shop can output them separately.
- Build layers in a flat file. In a single-artboard file, select one object and use Select > Same > Fill Color in Illustrator to pick every object of that kind, then move the selection to a new layer.
Tips
For large areas pick a lower level of detail: thousands of tiny footpaths add weight without adding anything visible on a poster. Delete the layers you do not need before sending the file on - it gets smaller and opens faster on the other side. Street names travel as a separate layer of object names in SVG and CDR, so you can keep or drop them independently of the drawing.
Credit the data
The maps are built from OpenStreetMap data, which is published under the Open Database License. When you print or publish a map, keep a short credit such as "© OpenStreetMap contributors" somewhere on the layout - in the corner of a poster or in the imprint of a brochure.