Building the Roman Empire #Vector #Tile #Map | Pelagios Commons
In our previous article, we wrote about the difference between raster tiles and vector tiles, ▻http://commons.pelagios.org/2017/09/rdg-update-the-roman-empire-vector-map-project. Now, we will be able to study the outcome. The technicalities of the process will be discussed, and the result as of now can be studied here ▻https://klokantech.github.io/roman-empire/#3.97/45.49/6.47. The section “Display the vector tiles with style” goes over the functionalities of the map.
The input layers for the map have been extracted from the SQL-database of DARE, ▻https://dare.ht.lu.se with a subset of the attributes, that is, places, roads, fortifications and provinces. The files can be edited in a desktop GIS application such as QGIS. Since we are publishing the data on Github, only data with an open license has been included in the project. They are all vector layers (point and line geometries) and have been converted to GeoJSON format in WGS 84 projection. They can be explored from the website of the project at Github, ▻https://github.com/klokantech/roman-empire in the data directory and previewed on a map. Among the input files are also the icons (in SVG format) that depict places of different types, and server scripts.