[Qgis-user] z factor

[Nicolas Cadieux]

Hi,

It's just the Z factor needed when you make a hillshade when the x an y 
are in degrees and the z is in feet or meters (like SRTM). You can see 
it if you choose Hillshade under symbology / render type (for a raster 
layer).  It's basically the length of a degree in meters for latitude.

https://www.esri.com/arcgis-blog/products/product/imagery/setting-the-z-factor-parameter-correctly/

Nicolas

On 2020-11-27 12:08 a.m., Richard Duivenvoorde wrote:
> On 11/27/20 5:28 AM, Nicolas Cadieux wrote:
>> I want to learn to make a QGIS plugin and I was wondering if anybody new if there is a QGIS plugin or tool that calculates the z factor for a particular latitude? I thought this would be an easy project to start with but I don't want to duplicate someone else's work.
> Hi Nicolas,
>
> What do you mean with "calculates the z factor for a particular latitude"?
>
> - z-factor as in x,y,z?
> - Do you mean based on a crs/datum? So more proj-based?
> - Or do you mean based on a known dataset with not enough z-info? So more extra/intrapolation?
> - Raster? Vector?
> - Creating a new dataset (processing)? Or just reporting for one lat (desktop/gui)?
>
> Just trying to get an idea of your idea :-)
>
> Regards,
>
> Richard Duivenvoorde
>
>
>
-- 
Nicolas Cadieux
https://gitlab.com/njacadieux