tcpMDT
Insert WMS/WMTS Map - MDT26
 | Command to execute in the CAD |
|---|---|
Vertical menu | MDT26 > GIS > Import WMS/WMTS |
Ribbon menu | GIS > Utilities > Import WMS/WMTS |
Command line |
23.5 Insert WMS/WMTS Map
The OpenGis consortium has http://www.opengis.org developed a protocol for obtaining geographic information through the Internet, and many public and private organizations have services of this type. This command allows you to connect to one of these services, download an image or images, and insert them into the current CAD drawing at the appropriate coordinates.
OGC\'s WMTS (Tile Web Map Service) provides a complementary approach to WMS (Web Map Service); WMTS uses a parameterized tile model in such a way that a client can make requests for a discrete set of values and quickly receive tiles from the server. Each of the layers of a WMTS server follows one or more pyramidal scale structures, in which each scale, or level of the pyramid, is a regular raster and fragmentation of geographic data at a particular scale or pixel size. Therefore, only one layer can be selected, unlike with WMS where you can select as many layers as you want.
First, a window appears with a list of the various map services configured in the program. This list includes a Name to identify the service, and a Web Address where you can make the map request. Items can be added to the list by typing on the line marked *. In addition, you have to specify the projection of the drawing, and if you want to obtain an image that occupies the entire visible drawing area, or designate a smaller window.
WMS-T Services: Currently some of the map services support the possibility of specifying the date that you want to have as a reference for the import of the map. This type of parameter is specific to each supplier. The user can specify this parameter in the appropriate address. Below is an example in which the web service of the Cadastre of Spain is accessed for a specific date.
The projection or CRS of the current drawing will be automatically displayed, however it can be changed or assigned by pressing the (...) and it will show us the following dialog:
When the service requires basic authentication, you can enter the Username and Password to access the service which will be encrypted and stored for later use.
When you press the Next button , the program connects to the service selected in the list and another window appears to select the layers to include in the image, as well as the format of the image. These options depend on the service selected.
If there is a surface in the drawing, the possible options for the dialogue will be Assign image as surface material. If we activate this option, the program is enabled to display this image in the commands Route by Terrain, Route by Road and Generate video. The Delete Existing Image option is enabled in case the drawing already has an image inserted. By activating it, you can easily replace a previous image with another, in case you run the command more than once.
When the selected service is WMTS, it is allowed to select a resolution other than the one calculated from the designated window and the zoom of the drawing, the list of resolutions will depend on the selected layer. To do this, in the Resolution box you can select the desired value.
You can give a name to the downloaded file and choose the location by pressing the corresponding button.
After pressing the Download Map button, the request for the image begins, and finally the program will request a file where it can be saved. A second file will be automatically created with the georeferencing data of the image, and the image will be inserted into the drawing.
The result is to download an image could be the following:
It may be the case that the download of the map is not carried out because there is no internet connection to the outside, this can happen in local or corporate networks in which the internet connection is controlled by a user and password system. Therefore, the command, if it cannot download the map because there is no internet connection, will request the username and password in a new window, so that if it exists, the user can enter the corresponding data. This data can also be added from the Utilities > Settings > Updates and fill in the data requested in the Proxy Data section.
^(2)^ The SRTM "Shuttle Radar Topography Mission" consists of a specially modified radar system that flew aboard the Space Shuttle Endeavour to acquire stereoscopic topographic elevation data . The elevation models derived from the SRTM data are used with the GIS Geographic Information System software, which can be accessed free of charge on the internet, and whose extension (.hgt) is supported by many software.