[Qgis-user] [QGIS-Developer] Sunrise, Sunset, Lunar Calculations

[C Hamilton]

GRASS does not seem to have lunar calculations. If it does it has not been
exposed in QGIS.

On Fri, Jun 28, 2019 at 9:51 AM C Hamilton <adenaculture at gmail.com> wrote:

> These seem to be basically what I am looking for, but they are an external
> process that saves the results to a file. It would be nice to simply have a
> method that returns the result. So now I am not quite sure how to proceed.
> GRASS probably has the functionality, but not in the form I would like.
>
> Cheers,
>
> Calvin
>
> On Fri, Jun 28, 2019 at 9:25 AM Christian Yrrman <yrrman at gmail.com> wrote:
>
>> Hi Calvin, Martin,
>>
>>
>> forgot to say there are also grass functions to do this, namely
>>
>> r.sunhours
>> r.sunmask.datetime
>> r.sunmask.position
>>
>> see
>> https://github.com/OSGeo/grass/tree/master/raster/r.sunmask
>> for reference.
>>
>> With this you can also get shadow areas from dems.
>>
>> Best
>>
>>
>> Chris
>>
>>
>>
>>
>> On Fri, Jun 28, 2019 at 9:53 AM Martin Dobias <wonder.sk at gmail.com>
>> wrote:
>>
>>> Hi Calvin
>>>
>>> On Thu, Jun 27, 2019 at 9:15 PM C Hamilton <adenaculture at gmail.com>
>>> wrote:
>>> >
>>> > How much interested would there be for a plugin to display sunrise and
>>> sunset information for a particular location on the earth's surface. Is
>>> anyone already working on this? There doesn't seem to be a capability for
>>> this, but perhaps I have missed it. Are there other astronomical
>>> calculations that would be worth while in QGIS? (Moon asimuth/position,
>>> phase)
>>>
>>> Just adding another +1 vote to have something like this in QGIS :-) At
>>> some point I would like to look into rendering of shadows of buildings
>>> in QGIS 3D - and for this it would be important to have the ability to
>>> calculate sun position.
>>>
>>> Cheers
>>> Martin
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>>
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