[Qgis-user] Hillshade Rough Blocks for 1m Rasters?

[cgray at graytechsoftware.com]

Nicolas, 

My x, y, and z are all in meters for my raster. The CRS for the project is also x, y, and z in meters. 

I tried your suggestion for changing the resampling. It definitely eliminated the problem, however it results in too much smoothing for my purpose. I do want to be able to see the actual pixel, but I want that pixel to be a single color representative of its value rather than a color with a boarder as shown in my screenshots. 

It seems this only occurs when the raster resolution matches the base unit of the CRS. I think this is a bug, but I have not exhausted the configuration options yet. 

Thank you, Chris

-----Original Message-----
From: Qgis-user <qgis-user-bounces at lists.osgeo.org> On Behalf Of Priv.-Doz. Dr. Maria Shinoto
Sent: Monday, June 29, 2020 7:15 PM
To: Nicolas Cadieux <njacadieux.gitlab at gmail.com>
Cc: Alister Hood <alister.hood at gmail.com>; qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Hillshade Rough Blocks for 1m Rasters?

A month ago or so I had exactly the same problem and could solve it with these tips from Nicolas. Good luck!

Maria


> Am 30.06.2020 um 07:32 schrieb Nicolas Cadieux <njacadieux.gitlab at gmail.com>:
> 
> Hi,
> 
> If your x and y distance unit is different from the z distance (like long lat degrees for x and y and meters for z), you will need a z Factor, or you need to save the raster in a crs that has x,y,z in the same unit (like meter).
> 
> https://www.esri.com/arcgis-blog/products/product/imagery/setting-the-
> z-factor-parameter-correctly/
> 
> You can also improve the look in the layer/Symbology/Resampling and select cubic for "zoomed in" and Average for "zoomed out".
> 
> Nicolas
> 
> On 2020-06-29 6:23 p.m., Alister Hood wrote:
>> It does shade the pixel, but it also shades the edges unless the layer is being reprojected.
>> There is a ticket for this, but you can workaround it by enabling resampling for that layer.
>>  
>> Date: Mon, 29 Jun 2020 16:57:11 -0400
>> From: <cgray at graytechsoftware.com>
>> To: <qgis-user at lists.osgeo.org>
>> Subject: [Qgis-user] Hillshade Rough Blocks for 1m Rasters?
>> Message-ID: <024601d64e57$dcbddd00$96399700$@graytechsoftware.com>
>> Content-Type: text/plain; charset="utf-8"
>> 
>> If I use a 1m resolution raster on a CRS in meters and render it as a 
>> hillshade, it appears to shade the edges of each pixel instead of the 
>> pixel
>> itself:
>> 
>> If I use, a raster made in a CRS with ft for units displayed on a CRS 
>> in meters, it renders each pixel smoothly:
>> 
>> How do I get the hillshade to render smoothly always, especially in a 
>> CRS in meters when using metric units for the raster?
>> 
>> Thank you, Chris
>> 
>> 
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