Overview

Basemaps are an integral part of Alloy, that allow you to view your asset data in a geographical context. There are many basemap types that you can use to meet your needs. Alloy provides you with the ability to change between basemaps if you require a different perspective for your data.

Adding a basemap

Alloy provides you with three system basemaps, that cannot be removed. You can add or remove as many custom basemaps as you need.

  1. Go to the right menu panel and select the Basemaps icon. A list of available maps is shown in the search panel.

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  1. Select the Add basemap button in the action bar. The Basemap creation process page is displayed on the left.

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All of the steps are mandatory, however, the configuration fields depend on the choice you make in step .

  1. Select step , the Basemap type page is displayed. This allows you to select one of three map types.

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  • XYZ - A tiled web map, slippy map (in OpenStreetMap terminology) or tile map (raster or vector) is a map displayed in a browser by seamlessly joining dozens of individually requested image or vector data files over the internet.

  • WMS - A Web Map Service (WMS) is a standard protocol developed by the Open Geospatial Consortium for serving georeferenced map images over the Internet. These images are typically produced by a map server from data provided by a GIS database.

  • WMTS - A Web Map Tile Service (WMTS) is a standard protocol for serving pre-rendered or run-time computed georeferenced map tiles over the Internet. WMTS services are useful if you want to make your cached map or image services available in an open, recognized way across different platforms and clients.

When you have selected the type of basemap you require, the Basemap creation process page is displayed, the first step of the process indicates that it is complete.

  1. Select step , the details page that is displayed depends on the type of basemap you selected in the previous step.

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Each basemap type requires you to enter an URL, although the format is different for each type. When you have entered the relevant URL select Next.

The URL you enter is validated within each type of basemap and you cannot complete this step until a valid entry is made. When you have completed the URL details for the basemap type you require, select Next, the second step of the process indicates that it is complete.

  1. Select step , the Basemap page is displayed.

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The following fields are common to all map types:

  • Name - This allows you to enter a name for the map that will appear below the thumbnail in the list of maps, this is mandatory.

  • Colour - You can also select the colour of the background that appears in the map area while the map is being drawn, see Selecting colours.

For WMS and WMTS maps you can complete the following optional field:

  • Watermark - This allows you to enter text that defines a watermark, this may be a requirement of the usage of the map.

For WMS maps you have the following option:

  • Image WMS - By default the map is provided as a set of tiles, if you select this option the map is provided as a single image.

For WMTS maps you have the following option:

  • Hi DPI tiles - By default the map is provided with a set of standard resolution tiles, if you select this option the map is provided as a set of higher definition tiles, providing the server you have connected to provides high resolution tiles.
  1. When you have completed the basemap details, the third step of the process indicates that it is complete.

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  1. Select Create basemap, the map is displayed and added to the list of available basemaps.