[leveller] Re: Georeferenced Landsat imagery in Leveller 2.6

  • From: Ray Gardener <rayg@xxxxxxxxxxxxxxxxxx>
  • To: leveller@xxxxxxxxxxxxx
  • Date: Mon, 13 Aug 2007 19:43:21 -0700

Thanks. Right off the bat, the ScreenScale.TIF texture has different geocoords than the Glencoe30mDem513x.tif terrain. The texture seems to be located above (north of) and overlapping only slightly on the east. The worldfile.bpw also has the UTM zone as 31N while the terrain is 30N.
If I don't request 'Use geocoords' in the texture dialog, and reset the texture params to defaults, the texture lands pretty close to the terrain. So this may be a case of the texture (or the terrain?) having the wrong coords. 

Ray



Greg Sandor wrote:

Sure.
Also, I was able to export it as a 24-bit tif. (unfortunately uncropped -- I don't know if Leveller is capable of cropping it to the heightfield, but I had hope.)
The subsets were made in MicroDem. They are only rough approximations of the size needed; in the past Ive been able to use Microdem to crop them but have had trouble with it today. And 3Dem woun't process them as the terrain is at the border of two UTM Zones. 

The file Glencoe30mDem513x.tif is a GeoTiff terrain.


Regards,

Greg

(614) 517-7204
greg@xxxxxxxxxxxxxx
http://www.gregsandor.com
----- Original Message ----- From: "Ray Gardener" <rayg@xxxxxxxxxxxxxxxxxx>
To: <leveller@xxxxxxxxxxxxx>
Sent: Monday, August 13, 2007 8:55 PM
Subject: [leveller] Re: Georeferenced Landsat imagery in Leveller 2.6
Can you zip up the texture geotiff and send it to me? It may be a band interpretation issue. 

Ray


Greg Sandor wrote:
Thanks. I think textures are enable in scene and in the map. I've tried both unmodified Bands and Subsets processed in Microdem. When I select the geotiff, the loading bar shows it loading, and its listed here in the properties, but even after toggling the tex icon, all I see is the regular colormap. 


DOCUMENT PROPERTIES

File: Import of Glencoe30mDem513x.tif
Stored in: (not saved yet)
Latest changes saved: FALSE
Title:
Author:
Copyright:
Stay above ground: FALSE
Water level: 0 px
________________________________________________________________________________ DOCUMENT STATE TRACKING PROPERTIES 

Number of queue elements: 1
Current queue position: 0
Initial state memory usage: 1.52 MB
Queue memory usage: 468 bytes
Time required for an Undo: zero seconds

Queue contents (newest to oldest):
   . Select None (zero seconds, 412 bytes)
________________________________________________________________________________ HEIGHTFIELD PROPERTIES 

Coordinate system: Geographic
 Units: meters
 Extents: 15360.000 x 15360.000 m
 Elevation units: meters
 Elevation origin: 0.000
 Elevation scale: 30.000
Size: 513 x 513 vertices
512 x 512 faces
Physical span: 0 to 37.383335 px
Max. polygons: 524,288
Volume: 3,346,756.5083 cubic pixels
Approx. surface area: 303,217.1119 square pixels
Min. elevation:  -4,096 px
Max. elevation:  4,096 px
Min. editing elevation:  -4,096 px
Max. editing elevation:  4,096 px
Has work area: FALSE
Memory usage:
   Elevations: 1 MB
   Slabs: 216 bytes
   Render buffers: 8.52 K
   Row cache: 2 K
   Normals cache: 0 bytes
   Total: 1.01 MB
Selection present: FALSE
________________________________________________________________________________ NAVIGATION APPEARANCE SETTINGS 

General Render Settings

   Representation: Solid
   Cull backfacing polygons: TRUE
   Clipping planes: Automatic
   Solidity:
       Lighting: Quick
       Polygon smoothing: TRUE
       Show shadows: FALSE

Scene elements:

   Heightfield:

       Sampling rate: 1 x 1
       Auto downsample: FALSE
       Draw partially: FALSE
       Use texture: TRUE
           Use texture opacity: FALSE
       Show selection mask: FALSE
       Wireframe style: Full
       Constant wireframing color: TRUE
           Wirefame color: rgb <0.00, 0.00, 0.00>
       Volumetric: FALSE
       Culled by water: FALSE
       Flip triangles: FALSE

   Background:

       Color: rgb <0.29, 0.78, 0.96>
________________________________________________________________________________ EDITING APPEARANCE SETTINGS 

General Render Settings

   Representation: Solid
   Cull backfacing polygons: TRUE
   Clipping planes: Automatic
   Solidity:
       Lighting: Quick
       Polygon smoothing: TRUE
       Show shadows: FALSE

Scene elements:

   Heightfield:

       Sampling rate: 1 x 1
       Auto downsample: FALSE
       Draw partially: FALSE
       Use texture: TRUE
           Use texture opacity: FALSE
       Show selection mask: FALSE
       Wireframe style: Full
       Constant wireframing color: TRUE
           Wirefame color: rgb <0.00, 0.00, 0.00>
       Volumetric: FALSE
       Culled by water: FALSE
       Flip triangles: FALSE

   Background:

       Color: rgb <0.29, 0.78, 0.96>
________________________________________________________________________________ NORMAL APPEARANCE SETTINGS 

General Render Settings

   Representation: Solid
   Cull backfacing polygons: TRUE
   Clipping planes: Automatic
   Solidity:
       Lighting: Quick
       Polygon smoothing: TRUE
       Show shadows: FALSE

Scene elements:

   Heightfield:

       Sampling rate: 1 x 1
       Auto downsample: FALSE
       Draw partially: FALSE
       Use texture: TRUE
           Use texture opacity: FALSE
       Show selection mask: FALSE
       Wireframe style: Full
       Constant wireframing color: TRUE
           Wirefame color: rgb <0.00, 0.00, 0.00>
       Volumetric: FALSE
       Culled by water: FALSE
       Flip triangles: FALSE

   Background:

       Color: rgb <0.29, 0.78, 0.96>
________________________________________________________________________________ Camera XYZ position: 0.0000, 283.5019, -393.9190 scene units 
Colormap: Classic Gray
Colormap size: 2 color points
Texture attached: TRUE
Image file: C:\Documents and Settings\Owner\Desktop\Current\Glencoe Env\p207r020_7t20000512_z29_nn10.tif 
  Size: 8,807 x 8,023 pixels
  Pixel data shared: FALSE
  Color depth: 8 bpp
  Angle: 0 degrees counterclockwise
  XZ Scale: 1,633.9258%, 1,488.457%
  XZ Offset: -2,564.3061%, -637.8685%
  Tiled: FALSE
  Using CS: TRUE
 Usable as OpenGL texture: FALSE
Water textured: FALSE
Flightpath recorded: FALSE
Reference shapes: 0
Shapes list file: (invalid pathspec)
________________________________________________________________________________ 3D SCENE PROPERTIES 

Pane size: 879 x 846 pixels
Showing water: FALSE
Water opacity: 50%
Selection visible: FALSE
Texture opacity: 50%
Depth map present: FALSE
Base shaping: Default
Memory usage:
   Bounding slabs: 16 bytes
________________________________________________________________________________ OVERHEAD MAP PROPERTIES 

Pane size: 328 x 830 pixels
Zoom level: 100%
Zoom level: 100%
Showing texture: TRUE
Texture opacity: 50%
Showing water: FALSE
Water opacity: 50%
________________________________________________________________________________ KNOWN MEMORY USAGE
Application memory manager is tracking 87 objects occupying 70.93 MB total 






Regards,

Greg

(614) 517-7204
greg@xxxxxxxxxxxxxx
http://www.gregsandor.com
----- Original Message ----- From: "Ray Gardener" <rayg@xxxxxxxxxxxxxxxxxx> 
To: <leveller@xxxxxxxxxxxxx>
Sent: Monday, August 13, 2007 7:54 PM
Subject: [leveller] Re: Georeferenced Landsat imagery in Leveller 2.6
Make sure the texture visibility is enabled. Access View, Scene Appearance, Heightfield icon, Overlays, Texture (checkbox). There is also a texture visibility toggle button on the scene's button panel (it looks like a 2x2 checkerboard). 

Ray


Greg Sandor wrote:
I've imported a geotiff .dem and I am trying to apply a georeferenced image (geotiff, landsat bands 1,2,3, and 8) in order to crop them for use in terragen. When I import the texture under the View menu, with geographic coords, it appears to load, but I cannot see it in the viewpane. Can anyone tell me how to do this or point to online documentation. Thanks. 

Regards,

Greg

(614) 517-7204
greg@xxxxxxxxxxxxxx
http://www.gregsandor.com

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