[Geoserver-devel] GeoServer & 32 bit float images

GeoServer GeoServer Developer
, ,
1

Hi,

I need some help and inputs with serving imagery using GeoServer as I’m new to it. Thanks in advance.

I downloaded 32 bit float TIFF images from Sentinel Hub to serve with GeoServer to a OpenLayers and JavaScript web map frontend.

https://sentinelhub-py.readthedocs.io/en/latest/examples.html

Tiff images are:

multi-band (3 bands) - true color, false color

single-band (1 band) - NDVI, NDWI

For some reason, by default QGIS automatically assigns an alpha band (eventhough there’s none) and sets transparency based on it and don’t display and I had to manually set transparency as “none” or “no” to see the image. ArcMap correctly loaded the images by default.

My questions:

  1. Does GeoServer support 32-bit float images and correctly display them?

  2. What is the recommended process to stylize or color single-band greyscale images? E.g. NDVI values ranging from -1 to +1? Can I use .clr, .sld files?

  3. Do I need any extra plugins for GeoServer?

  4. I will have several hundred small images for multiple dates. Is it easier if I make a mosaic and add images to it and just style the mosaic once rather than style each small image? What’s the best way to do this?

  5. The web map is to do both visual (colors) and numerical info (pixel values on click). So is it easier if images are imported into PostGIS and then brought to GeoServer?

Cheers,

Arun