Band Math Expressions

[abillits]

Perhaps this belongs over on the rio-tiler github but I'm asking here in case there are limitations imposed by Titiler.

Is there a list of what's possible with band math expressions? I gather that basic addition, subtraction, division, and multiplication are possible. However, are there any more advanced functionalities?

Specifically I'm interested in something like: max(b4,b5,b6,b13) that would return that max value out of those bands. Similar for minimum.

[vincentsarago]

@idtstudios, yes this should be in rio-tiler but it's fine I should probably make the doc clearer for this.

band math expression using numexpr so here are the operator/function available https://numexpr.readthedocs.io/en/latest/user_guide.html#supported-operators

Sadly max is not part of the available function (see pydata/numexpr#86)

[abillits]

Thanks for the response. This is what I needed. It looks like I might be able to do max/min via the where function.