Comments on: Three Things You Need for Fast Orthophotos

By: Jeff Mueller

Jeff Mueller — Fri, 01 Apr 2011 14:58:35 +0000

Just tried to convert my ortho pols for KLAX from PNG to DDS and Grinder gives me the error that it can’t convert it. Is this because they are 2048 x 2048?

Thanks,
Jeff

By: Ben Supnik

Ben Supnik — Mon, 28 Mar 2011 16:12:06 +0000

In reply to andyw248. The end result _must_ be the entire base mesh. The only tool set that LR provides is MeshTool, which builds base meshes from scratch - it's the only tool chain we have.

By: Ben Supnik

Ben Supnik — Mon, 28 Mar 2011 16:11:27 +0000

In reply to Lubos Pusty.

1. Yes, you can definitely have different sized orthophotos – just make sure the LOAD_CENTER directive has the real sizes of the real orthophoto in both meters and pixels.
2. I don’t know. If you use MeshTool, it does both the DSF and .ter files, but I would not call MeshTool easy to use. A .ter file doesnt’ really have enough info to build the whole DSF.

By: andyw248

andyw248 — Mon, 21 Mar 2011 02:54:57 +0000

Is it possible to rebuild/patch a base terrain file using .ter files for only part of a tile, or does it have to be done for an entire tile?

By: Lubos Pusty

Lubos Pusty — Sun, 20 Mar 2011 22:47:19 +0000

Hi Ben,

thanks for the post, I’ve learned the points you’ve mentioned the hard way 😉
I still have 2 questions related to this topic:

1. Is it possible to have multi-sized polys with ortophoto texture in the base mesh? I think yes but haven’t had time to test it yet. Reason is that raw orto I have is in resolution of 512×512 what means tons of small files. To cope with this, I’m merging them up to 2048×2048, but on boundaries I cannot do it and have also 1024×1024 and 512×512. Will this work?

2. Assuming I already have .ter files generated, what is the easiest way to generate dsf from them?

Cheers,

Lubos