topic Re: ArcGIS 10.2 - Referenced Raster Mosaic hillshade function? in Elevation Data Questions

ArcGIS 10.2 - Referenced Raster Mosaic hillshade function?

VincentLaunstorfer — Tue, 09 Feb 2016 12:10:38 GMT

Hi,

I just discovered the referenced Raster Mosaic using function such as hillshading. It looks great!

However, how could I adjust the display (file attached) in order to show only shades (black) and not the greyish parts?

I would like to use a sort of white or brown background and accentuate the relief with shades...

Re: ArcGIS 10.2 - Referenced Raster Mosaic hillshade function?

DanPatterson_Retired — Tue, 09 Feb 2016 14:13:46 GMT

Vince... is the attached too much? It was just hillshade with shadows modelled

Re: ArcGIS 10.2 - Referenced Raster Mosaic hillshade function?

VincentLaunstorfer — Tue, 09 Feb 2016 14:29:55 GMT

Thanks. Yes it is too much. I am looking for subtle shading such as the IGN map attached... A hillshading just to accentuate the relief and overlay other layers... If this makes sense.

Currently, I experimented the Hillshading function in a Referenced Raster Mosaic with a z-factor = 0.00001

Perhaps, this is the wrong function to use?

Re: ArcGIS 10.2 - Referenced Raster Mosaic hillshade function?

DanPatterson_Retired — Tue, 09 Feb 2016 22:18:14 GMT

I get your idea... I did get distracted some time ago with bump mapping Introducing the ArcGIS bump map tools | ArcGIS Blog

can't get distracted for a while... post if you find something interesting.

Re: ArcGIS 10.2 - Referenced Raster Mosaic hillshade function?

VincentLaunstorfer — Fri, 12 Feb 2016 16:03:18 GMT

Thanks for the Mapping Centre link on bump maps... Interesting and this need some experiments, time permitting.

The effect I am looking for is a sort of subtle shading such as the NG map sample attached. Perhaps tweaking the luminosity of the hillshading layer produced in the Referenced Modaic Dataset could help to produce a similar style...

Re: ArcGIS 10.2 - Referenced Raster Mosaic hillshade function?

DanPatterson_Retired — Fri, 12 Feb 2016 16:10:19 GMT

Yes, it may but I haven't had the time to check

Re: ArcGIS 10.2 - Referenced Raster Mosaic hillshade function?

ArthurCrawford — Wed, 02 Mar 2016 18:18:02 GMT

Hello Vincent,

Since the hillshade function goes from 0 to 255, you could use a remap function to get rid of a range of the "grey" areas. 0 is darkest, so I would suggest starting with a 40 to 255 as nodata. Another option would be to just apply it as symbology as we do in the World Topo Map and using the histogram.

Thanks,

Arthur Crawford