Increase 32 contour regions limit

[dBitech]

It would be useful to have an output mode where the dBm or dBuV/m can have more than 32 steps. Given we output at least 24bit image files, we easily increase the number of contours.

Further, if we do this within the GeoTIFF realm, we can multiband, and have the 1 file contain both path loss as well as field strength information. This GeoTIFF can easily then be used by other tools like Rio-RGB to produce datasets that can be used for high performance, mapping through for example Mapbox Terrain-RGB inspired frameworks accessible through Mapbox-GL for both the web and native

[der-stefan]

Absolutely! I fully agree with your idea. GeoTiff is already implemented in the "json" branch and would easily accept higher "color" depth or additional bands. The WriteImage functions have been also cleaned up and could be adapted to a universal output.

[der-stefan]

By the way: Use "-sc" for smooth rather than quantized colors. That should be default for path loss output in geotiffs anyway.

[dBitech]

I've done up a quick patch to allow the GeoTIFF to output band5 with the path loss, does anyone think there ould there also be merit in adding the additional bands for Field strength?

[der-stefan]

My proposal: Let's split the outputs into several files:

• *_raw.tif => contains pathloss and line-of-sight as two bands. This is an universal output independent of the TX power. You can take this file as input for the following outputs:
• *_pl.tif => contains pathloss as RGBA with applied color palette
• *_los.tif => contains line-of-sight as black pixels
• *_dBm.tif => contains receive power as RGBA with applied color palette
• *_dBuVm.tif => contains electric field strength as RGBA with applied color palette

Calculating the raw output (pathloss and LoS) is computationally complex and is conducted anyway for each SPLAT simulation. The calculation of the other outputs is absolutely simple - it is just scaling according to the user's input of TX power, RX antenna gain etc.