[Qgis-us-user] How to convert raster elevation data using the raster calculator?

[Cristoforo Montanari]

    I have an elevation DEM in the form of a GeoTIFF file downloaded from USGS for a southern California area near Chatsworth CA. I noticed so far the the default co-ordinate system seems to be EPSG:4326 WGS84 with the elevations in meters.

    I tried many ways to convert the CRS to NAD83 California Zone 5 along with the elevations and so far only the X and Y axis and not the elevation data are converted. I also tried to convert the elevation data over to feet with gdalwarp however I was not yet successful at doing so. When I checked my elevations they were still in meters.

   I tried to convert the elevations over to feet by applying a scale factor:

    "your_raster_layer" * 3.28084

   So far I couldn't get the raster calculator to accept the input. There was a dialog box that came up stating that something about my input was incorrect. Could I get some assistance please, how to use the raster calculator with this type of DEM from USGS in GeoTIFF format to apply the conversion factors to the elevations after I converted to NAD83?

P.S.

    I seem to remember using QGIS a while ago and finding California Zone 5 in my basket of CRS's however this time around I am only finding NAD83 UTM 11. Is there a way to get back or download CRS for California Zone 5 of NAD83?

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