WMS (OGC Web Map Service) from Capabilities

Adding an OGC Web Map Service (WMS) adds an image of the data to your WebMap site.

To use this service your data should be served out as a WMS. This can be done through GeognoSIS (See Serving out data using OGC services)

Using WMS from Capabilities adds all data saved being served out as a WMS from your GeognoSIS instance.

  • If data layers are in Overlay Group Folder(s), set status to Editable or Hittable
  • Data layers for the Map Features: Set status of individual overlays to Editable or Hittable.
  • Base Mapping layers for Base Map Switcher menu: if an overlay's status is set to Visible or Invisible, it will be treated as a base mapping layer.
  • Base Mapping cannot included in an Overlay Group Folder.

Adding the data

  1. Begin by assigning the overlay an appropriate name.

  2. Next add the URL to the WMS (you will find the URL in the capabilities document.)

Field Optional
or Required?		 Description

Layer Type

Required

URL to the WMS, if being served out by GeognoSIS this can be found in the capabilities document.

Name

Required

An appropriate user added name.

Add URL

Required

URL to the WMS, if being served out by GeognoSIS this can be found in the capabilities document.

Individual Data Layers

Optional

All data layers are added as single layers and can be individually toggled on and off in the Map Features dialog.

Individual Base Layers

Optional

All base layers will be displayed as single selectable layers, rather than grouping layers together. This is not recommended if a scale threshold has been applied.

Sort Groups

Optional

Orders the overlays within a group so that they appear in reverse alphabetical order. This can be used to ensure the overlays appear in a consistent order.

Base Layer Image Format

Required

Sets the image format that the base layers will be served out as.

Data Layer Image Format

 Required Sets the image format that the data layers will be served out as.

Only Add Leaf Layers

Optional

This ignores any group structures in the SWD and adds all layers at the same level.

Data Layers Initial Visible

Optional

Data layers will be initially visible when the page is first loaded.

Transition Effect

Required

This defines how the map transitions between zoom levels. Currently there is only one option: resize.

This resamples the current tile and displays it stretched or compressed until the new tile is available.

Expand Base Layer Group

Optional

Any base layers included in the layer tree that are grouped together will be initially expanded in the Map Features.

Expand Data Layer Group

 Optional

Any data layers grouped together will be initially expanded in the Map Features.

Single Tile

Optional

The whole map is returned as one single tile; this reduces the number of requests made to the server. However it prevents the map from appearing as a slippy map. When panning, the whole tile is reloaded for the new location.

Copyright

Optional

Any text entered here will appear on the bottom left of your site.

Buffer

Required

Creates a buffer of tiles outside the visible map frame. This gives you a smoother experience panning around the map. However it creates a bigger request meaning the server will be busier for longer and the site can be slower to load.

Initially Visible Base Layer

Optional

Allows you to choose a base layer to be visible initially. Enter the name of the base layer from the capabilities document in the GeognoSIS Manager.

SLD

Optional

Styled Layer Descriptor. This is an XML schema which describes the appearance of layers.

Show Legend Button

Ignore

This option is present for legacy support of Web Map Layers 7.1, if using the standard Cadcorp SIS WebMap site this parameter can be ignored.

Show Image Checkbox

Ignore

This option is present for legacy support of Web Map Layers 7.1, if using the standard Cadcorp SIS WebMap site this parameter can be ignored.

Composite Data Layer

Optional

This option draws all layers within the WMS as one layer meaning there are less requests to the server. Layers within the WMS can be turned on and off individually, however Cadcorp SIS WebMap will have to make a new request to the server each time and redraw the entire layer.

Projection

Required

Select from a predefined list of SRID numbers to define what projection the data will be drawn in.

More SRID numbers can be added in the Projections table of the webMapLayersConfig.db.

Exceptions

Optional

The format in which an exception is returned. It can be set to INIMAGE where the exception message is displayed in the image or BLANK so that no image is returned.

Tile Width

Optional

If the single tile option is not used, define the size of the tiles to be used. The default value is 256.

Tile Height

Optional

If the single tile option is not used, define the size of the tiles to be used. The default value is 256.

Use Authenticated Proxy

Optional

Tick this box if your WMS is accessed through an authenticated proxy server.

Proxy Url

Optional

If using an Authenticated Proxy specify the URL.
Example: http://{MachineName}/WebMap9/AuthenticatedTileCacheHandler.axd. MachineName may be localhost.

Proxy User Name

Optional

If using an Authenticated Proxy specify the User Name.

Proxy Password

Optional

If using an Authenticated Proxy specify the Password.