Source code of OpenWeGIS on GitHub. Initial commit.

Now you can use OpenWebGIS without having to connect to the server of OpenWebGIS and even without Internet connection. For doing this just download OpenWebGIS source code from GitHub.  

About OpenWebGIS and 3D maps

Please read information about OpenWebGIS and 3D maps at Cesiumjs.org here: http://cesiumjs.org/demos/OpenWebGIS.html.Cesium is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin. It uses WebGL for hardware-accelerated graphics, and is cross-platform, cross-browser, and tuned for dynamic-data visualization. Cesium is used in OpenWebGIS primarily to create 3D View of the maps.

Mona Lisa on the map of OpenWebGIS and QGIS - Art and GIS together

The article "Extrude image to 2D vector, 2.5D and 3D layers on the map" describes the OpenWebGIS function called "Extrude Image". How can this function be used in addition to what was described in the article? For example, you can put your photo on the map and see how it would look like if it is extruded (that means to calculate the height of each pixel depending on its luminance). It can be fun.

 

And let`s put on a map the famous painting titled Mona Lisa. It is a half-length portrait of a woman by the Italian artist Leonardo da Vinci, which has been acclaimed as «the best known, the most visited, the most written about, the most sung about, the most parodied work of art in the world». Take a photo of the painting from Wikipedia and save on your hard disk- see Figure 1.

Extrude image to 2D vector, 2.5D and 3D layers on the map

In OpenWebGIS a new function has been created to manipulate images.

With the help of this function, you can calculate and get the height (height and altitude) of each pixel of your image. The calculation is performed based on the luminance (brightness) of the pixel. These estimates are used for the creation of:

1. Vector layer (consisting of squares the number of which is equal or less than a number of pixels - it all depends on the settings you specify);
2. Layer that consists of 2.5D columns based on "OSM Buildings" technology. For more information about "OSM Buildings" read here: "Integration of OpenWebGIS with OSM Buildings JavaScript library";
3. The three-dimensional (3D) layer-based technology Cesium. For more information about "Cesium" read here:"3D maps, new version of Cesium JavaScript library and OpenWebGIS".