Profil tool graduation and rounding for displayed labels

[sebbelese]

Hello,

I use the profil tool in my web-gis application to display raster profiles along polylines. It works quite well, but I have an issue with graduations.

I try to obtain a generic scaling of the y axis, working at any scale:

let zmin = feature.get('zmin');
let zmax = feature.get('zmax');
let graduation = Number(((zmax-zmin)/20).toPrecision(2));

profil.setGeometry(feature, {"graduation":graduation});

where zmin and zmax are features properties defining the z data range.

It works quite well in some cases:

But sometimes, the labels are not rounded adequately, leading to unreadable values:

Would it be possible to round these labels for readability, for example by using ".toPrecision(...)" with a max number of digits? Or is there any alternative way of doing it?

Another issue: I am not sure why the number of graduations is so different between the two plots with similar ranges. I was expecting ~20 graduations for each plot. A difference between the two situations is that the graduation value is 0.93 (<1) for one plot and 1.1 (>1) for the other one.

Thanks for any help!

[Viglino]

Hello,
I've added a zDigits option to let you set the number of digit in the profile.

[sebbelese]

Waw, it was fast!

Thanks, it works.