Problems with plotting caused by WMS services

WMS services usually provide raster data, so a WMS layer then is a raster layer.

In addition to the plotting problems discussed in the other articles, there are further aspects to consider with WMS services.

Problem:

• The WMS layer is not included in the plot.
• The WMS layer is included in the unrotated plot, but not in the rotated plot.
• The WMS layer is included in the series plot (e. g. route plot) only for some sheets.

Cause:

• The data limit of the WMS server has been exceeded.

On the web, bandwidth limitations and response time adherence are necessary to avoid adverse effects on the user community. Therefore, almost all WMS servers have set a data limit and a timeout.

Using a WMS service with large output formats and/or at high resolution (dpi) may exceed the data limit of the WMS server.

With rotated plots, the bounding box of the plot area increases. This increases the amount of data requested by the WMS server. This may cause the data limit to be exceeded.

Solution:

• Reduce the WMS layers to what is absolutely necessary.
• Reduce the resolution (dpi) to the acceptable minimum.