As all the tiles are pre-created, all that is required to publish the map on the web is to copy the html page and the tile directory onto a web server, making sure that the Google Maps API key contained in the html file is correct for the site. When the create button is pressed, the result is an html page and a directory containing all the required Google Maps tiles. The application shows how many tiles will be created, which can be changed by altering the maximum zoom level slider or by limiting the geographic area. Colouring is achieved by setting colours and thresholds for values in the attribute data e.g.

The displayed attribute, colouring of the data, geographic extents and maximum zoom levels are defined by the user. This file is easily created externally if needed. A projection file (.prj) MUST be included with the shapefile, otherwise the data cannot be placed in the correct position over the Google Map. How It WorksĪ shapefile is loaded into the application and displayed on the screen. To date, a variety of thematic map for different parts of the world have been produced to test the viability of the application with real data on production web servers. This data forms the worked example installed with the application and the steps required to do this are detailed in the example. In order to produce this map, the sensor logs were converted into a shapefile and loaded into the Google Map Creator. The data above shows an aggregate of carbon monoxide data collected over a two week period during May 2004 using GPS tracked sensors.

Google map creator