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vvoovv / blosm

Blosm addon for Blender. A few clicks import of Google 3D cities, OpenStreetMap, terrain. Global coverage. Source code is in the branch 'release'.
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better terrain geometry #529

Open BernardoI opened 6 days ago

BernardoI commented 6 days ago

Hello! I have the premium version of the blosm addon and it's great! However, I wonder if there's a way to get the terrain in better quality.

I am trying to work on a tuscanian city, and when I download the terrain from the blosm addon, this is how it looks: image While the overall quality is good, you can see that the coastline is all jagged, and that's not good.

Is there a way to chose a different source for the terrain elevation?

In the blenderGIS addon you can chose from the OpenTopography DTM 30m model, which is much better, with no jagged coastline. However I cannot figure out if there's a way to georeference the 2 models (from BLOSM and BlenderGIS) in order to match them perfectly, or even better, if there's a way to chose the source of the elevation model in the BLOSM addon.

Thank you!

vvoovv commented 6 days ago

Hi @BernardoI

You can also use Google 3D Tiles to get the terrain.

BernardoI commented 6 days ago

Hi @vvoovv , thank you for your answer! Wouldn't I also get buildings with the google tiles? I would like to just get elevation data. I know that elevation data probably also includes buildings (I guess? not sure) but it comes in the form of a terrain, not buildings+terrain. Or am I missing something?

vvoovv commented 6 days ago

There are often complains that an area of interest doesn't contain 3D buildings in Google 3D Tiles. But your case is opposite :)

Just try it out. Anyway, you can try a lower resolution to get an area without 3D buildings.

BernardoI commented 6 days ago

thanks! I was hoping however, that in a premium addon you would have a bit more options when it comes to getting elevation. BlenderGIS has more options here, but I cannot however figure out how to make the 2 interact together with georeferencing

vvoovv commented 6 days ago

PROJ.4 parameters of the default projection:

+proj=tmerc +a=6378137 +b=6378137 +lat_0=<lat> +lon_0=<lon> +k_0=1 +x_0=0 +y_0=0 +units=m

where <lat> and <lon> are equal to the custom attributes lat and lon of the active Blender scene or to another center of the import.

BernardoI commented 5 days ago

Thank you! where should I use that text exactly?

vvoovv commented 5 days ago

I hope it can be used in BlenderGIS to import the required data in a Blosm projection.