Day 2

Yesterday I was able to get the basic SRTM data displayed and converted to UTM data format.  This morning I have been viewing more of the ‘3dem setup’ (second of a series) video tutorial, and reading the Scenery Toolkit ‘HowTo’ document.  After the UTM coordinate transformation, the two start to diverge.  The video tutorial continues on with a number of transformations, while the CST HowTo recommends saving the data at this point.  The problem with saving the data is that I’m not real sure where to put it, as the video tutorial folder layout may or may not be consistent with the layout implied by the CST HowTo.  Ah well, I like the idea of saving early and often, so I’m just going to hold my nose and save the *.bin and *.hdr files to the top-level scenery folder – I can always move them later.

So, I did the save, and wound up with a CaesarCreek.bin file of 20+ MB, and a very small .hdr file.  I was curious about the header file, so I opened it in TextPad, and saw the following:

file_title = CaesarCreek
data_format = int16
map_projection = UTM Zone 16N
ellipsoid = WGS84
left_map_x = 582750
lower_map_y = 4317120
right_map_x = 845550
upper_map_y = 4657590
number_of_rows = 3784
number_of_columns = 2921
elev_m_unit = meters
elev_m_minimum = 109
elev_m_maximum = 469
elev_m_missing_flag = -9999

 

So, it appears to be a pretty succinct description of the scenery boundaries.

Next, using the video tutorial again, I adjusted the number of rows and columns to get an integer number of terragen tiles, at 256 rows x 256 columns per terrragon tile.

Then changed the coordinates to decimal degrees.

Saved the matrix to the ‘setup’  folder.  Saved .bmp and .jpeg images to the ‘images folder’

 

On to Tutorial #3 – ‘Bin to Raw’ (I think this corresponds to Step 6 in the CST HowTo).  This whole step seems to be just ‘copy the original .bin file and then change the extension of the copy to .raw’.  Don’t know why the HowTo and the video are so puffed up.

Next up ‘Raw to TRN’ video.  Launched the RAW to TRN converter tool.  Opened the header file, entered columns in to width, rows into height.  Then saved as ‘trn’ file.  Video made a special note that the ‘.trn’ actually had to be typed in (bug?).

 

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