PointSymbolizer: Gradient / interpolation fill colour based on age of timestamp?

GeoServer GeoServer User
1

Hi all,

I cannot seem to work this out myself, so hopefully no one minds if I ask here :sweat_smile:

I have a layer that retrieves latitude and longitude recorded over the last 3 days and converts them into points. Can a SLD styling fill in the points using a colour between red and green, depending on how long ago the point’s timestamp was?

Adding an ‘age’ column into the SQL view should be no problem, but I don’t quite know how to work that into the styling.

A colourmap will be a suitable alternative if true interpolation is impossible, assuming if even that is possible with points.

2

Hi,

try using the interpolate function in the fill of your mark… or one of the other functions in that same documentation page if you want a different progression (by steps, by unique values).

If you need a good looking GetLegendGraphic result for that legend, make sure you’re on a recent release.

Hope this helps

Cheers
Andrea