[gdal-dev] Question on python gdal.Rasterize()

[Stephen Woodbridge]

OK, After some more research, I found the rasterize.py autotest file 
which was a huge help and I have code working that burns the tracks into 
an image. But its not exactly what I hoping for so I'll give the 
gdal.Grid() a try.

Thanks,
   -Steve

On 6/14/2019 1:58 PM, Stephen Woodbridge wrote:
> Hi all,
>
> My goal is to take satellite track data and create a gtiff file using 
> Python.
> The satellite data is in a NetCDF file, which I can read in Python and 
> has variables lat, lon, ssha. There are a continue stream of the 
> NetCDF data over time so I plan to just keep loading them as they 
> become available.
>
> My thought is to take adjacent track points as a LineStringZ and burn 
> them into the image overwriting any existing data. This will keep the 
> gtiff up to date with the most current data for any given area.
>
> Maybe there is a better way to do this? suggestions welcome.
>
> I was looking at gdal.RasterizeOptions() and gdal.Rasterize() and my 
> thought was that I could create feature with geom like (lon, lat, 
> ssha) and then rasterize that into the image using the option 
> "useZ=True" but this seems to imply that I need to have an ogr source 
> for the vector data. It would be much more convenient to be able to 
> just pass features from python to the Rasterize() function.
>
> I see callback and callback_data in the options can these be used for 
> that? How?
>
> Rasterize(destNameOrDestDS, srcDS, **kwargs)
>
> I can open the gtiff file and then pass the handle of that to 
> destNameOrDestDS.
> Can a create an in memory srcDS that I've loaded with the track 
> segments. The NetCDF files have about 5-6000 track points in them so 
> an eqivalent number of LineStringZ features.
>
> Is there an example of something similar you can link me to.
>
> Thanks,
>   -Steve


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