[Qgis-user] z factor

[Priv. Doz. Dr. Maria Shinoto]

Nicolas, 

that would be helpful indeed! Yet I do it manually each time...

Maria



> Am 27.11.2020 um 14:13 schrieb Nicolas Cadieux <njacadieux.gitlab at gmail.com>:
> 
> 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
> 
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