How to change the appearance (i.e. remove the cross hatching lines) of the map on BaseCamp

That's the default (very ugly) way how Garmin renders wood and forests: http://www.openstreetmap.org/browse/relation/534604

If you have downloaded the map from garmin.openstreetmap.nl, you can choose the new layout or the basic map with "mapnik" typ file, this will render it as it should: green.

OSM is just a database and many many different maps and services are made of it. You can download a different Garmin map if you want to try.

Interesting - same problem, same area: http://advrider.com/forums/showthread.php?t=844834 Solution there: use another map provider.

If the cross hatching lines would mean "grid" (I see now in the screenshot that it is no grid here) they could be a feature of your BaseCamp and you just would need to switch it off in the options.

Hello,
I am a very “old’ user of Garmin GPS, and I have successively used Etrex vista, 60, 64 and now the new Garmin 66. I mainly use these equipment’s for trail running or long Hiking.
For a long time I used the Garmin Maps and more recently OSM Maps. In the case of OSM maps, I regularly participate to their improvement. I also work personally on the improvement of "typ" files for a good display on my GPS and on Basecamp.

As a general rule, I need maps for France but also maps for France near Switzerland, and Italy. So, to have the nice maps, I used for France, the maps downloaded from:

http://garmin.opentopomap.org/),

and for the borderlines countries, the maps downloaded from:

http://garmin.openstreetmap.nl/ (ex: maps for Ultra Trail Mont Blanc on GPS )

The main problems with these choices:
– Need some works and time to have good maps (adding contourlines,..)
– Very poor “Typ” file, so you need improvements with tools like TYPWizz or mapedit to have an acceptable viewing on the GPS;
– Not easy to have good DEM data; in general only SRTM data are available. And in Basecamp only the Longitude and latitude are displayed;
– Poor description of polygons;
– Only a few category of paths or tracks (in general all paths are of the same class: no group 1, group 2,..);

Recently, I discovered openMTBmap https://openmtbmap.org/

I immediately realized that the map that are produced by "openMTBmap" are all I have always wanted to have:
– Very good “typ” files and especially very complete
– Complete description of all sorts of polygons,
– Very good DEM data on the basis of comparisons between registered tracks with the new Garmin 66 see: https://openmtbmap.org/download/dem-relief-shading/ (Chapter: Contourlines/DEM data)
– In Basecamp, DEM data (Altitude) are all displayed simultaneously with Latitude and longitude .
– Installation process very easy;
- During installation of map and after, you have a choice between 6 layout for different activities (mountain bike, trail, car,..)
Here is a link to a PDF file, with Polygons and Polylines examples in the "typ" file, and maps near BELLINGHAM, at different zoom level.

Regards
Gerard C
France