polygon labeling issue

[4tler]

Hello, I've been working on creating my own theme for mapsforge vtm vector data for a short time. I noticed that polygons are unfortunately labeled multiple times when you increase the zoom level. I have tried this with the example app and the themes integrated there and the problem remains. Is there a workaround for this?

my theme:

osmarender theme:

[devemux86]

Please write the coordinates of your examples.

Are you sure the campings are not nodes?

For polygon labels you can try VTM "area-size" parameter of caption / text rules.
See in xml schema [1, 2] and an example in default.xml.

There is also the Parameters class with static flags that affect various things in the library.

[4tler]

Coordinates: 51.937050567024656,13.89522135257721

We will check the VTM area size parameter but the problem is also in the standard themes.

[devemux86]

I cannot reproduce what you report with brandenburg.map from Mapsforge server, VTM themes and vtm-playground.

You can add or increase the "area-size" parameter if want fewer labels.

[4tler]

i think the standard mapsforge files don't support this. because they don't render e.g. camping sites as areas but only as poi. i added some things to my tag mapping to really have all camping sites in the map. So nodes and areas.

here is an example .map file produced with my tag-mapping.xml

SpreeNav_Spreewald.zip

by the way, is there a option where i can find support for Cruiser desktop (WIN)? Because the Cruiser App works perfect but the Cruiser-gl crash with every start. Testet with 2 systems.

[devemux86]

Use the Parameters.POLY_CENTROID flag.

As mentioned in the comments,
if map files are not created with global or local label-position,
you can force that calculation when reading the map files.

[4tler]

we will check this and report...thanks

[4tler]

thank's, that's the problem and the solution.

[devemux86]

It is impossible to examine everyone's code and examples.
Reports need to be reproduced with official samples / maps.

There are cases with official maps with multiple polygon labels.
Some users may need it, specially with large polygons (to not be empty).
Everyone else can use the Parameters.POLY_CENTROID flag.