G3W-SUITE base layers

Below are the instructions for adding, modifying, or deleting configurations for Base layers, the base layers of webgis services that are independent of the project and configured at the Map Group level.

These operations are exclusively allowed to users with the Admin level 1 role. Base layers can be configured from within the Django admin interface.

Form fields:

• Name: an internal identifier for the base layer.

• Title: the name of the base layer.

• icon: an image to use in the list of available base layers in the related tab in the webgis.

• Description: a descriptive field for the base layer.

• Property: the base layer configuration in the form of a python dict.

In the Property field, you can configure TMS, WMS, and WMTS services as base layers. Below are some examples:

TMS

{
 "crs":{
  "epsg": 32632,
   "proj4": "+proj=utm +zone=32 +datum=WGS84 +units=m +no_defs",
   "geographic":  'false',
   "axisinverted": 'false',
  "extent" : [166021.44,0.0,833978.56,9329005.18]
},
 "url": "https://sit.parco.gran-paradiso.g3wsuite.it/caching/api/qdjango30/{z}/{x}/{y}.png",
 "servertype": "TMS",
 "attributions": "Ortofoto Piemonte AGEA 2015"
}

WMTS

{
 "crs": {
    "epsg": 27700,
    "proj4": "+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000 +y_0=-100000 +ellps=airy +units=m +no_defs",
    "geographic": False,
    "axisinverted": False,
    "extent": [-103976.29764287075, 6853.1136085508915, 616829.1229036889, 1243036.259830151]
 },
 "url": "http://localhost:8080/mapproxy_conf_2378/service/?",
 "servertype": "WMTS",
 "attributions": "",
 "layer": "MVDC_DistrictBoundary",
 "extent": [508630.2485007373, 134752.46570880772, 528222.6959272355, 161343.02015124384],
 "grid": "localgrid_wmts",
 "grid_extent": [508630.2485007373, 134752.46570880772, 528222.6959272355, 161343.02015124384]
}

IMPORTANT the configurations shown above are not JSON but are Python dict

Below is a brief description of the parameters:

• crs*: full declaration of the reference system of the data we are accessing.

• url*: url of the service to reach including placeholders if necessary (e.g., {x}{y}{z} for TMS services).

• servicetype*: one of the following values: TMS, WMTS, WMS.

• layer: the name of the service layer to call for WMTS and WMS.

• extent: a list that represents the data extent.

• attribution: a string indicating the attributions that will be shown on the webgis service when the base layer is active.

• grid: the name of the grid to use in WMTS services

• grid_extent: extent of the grid declared in the grid parameter

* mandatory parameters