A hillshade is a grayscale 3D model of the surface, with the sun's relative position taken into account for shading the image.
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96 views
Hillshade for 30m NED at continental scale
I'm new to terrain analysis. I have a 30m NED DEM (.tif) for the conterminous US. I would like to generate a nice looking hillshade for the US, but it looks bad - as in pixelated and rough (See ...
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3answers
148 views
What could cause garbage hillshade output
I've used Hillshade successfully in the past, but for this DEM I keep getting a weird output. It's a 30-meter TIFF downloaded from the National Elevation Dataset.
And this is what the output looks ...
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1answer
68 views
Projection WGS 84 is slightly displaced referring to a hillshade in QGIS
I have a hillshade and a vector layer. The vector layer is slightly displaced referring the hillshade. About lat=100m and long=175m
The CRS of the project is EPSG:3397 - PD/83 / Gauss-Kruger zone 4.
...
2
votes
1answer
203 views
Where to find ready to use automate shadow detection algorithm?
I am searching for an algorithm to make a shape file of every shadow in Landsat image (30 meters per pixel). I need to classify lakes at the image, but territory is very mountainous and shadows are ...
3
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3answers
353 views
Merge DEM and Hillshade to create one file?
I am wondering if I could merge DEM and Hillshade ? What is the pro and cons for that? Thanks
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2answers
508 views
Can I reproduce this classic cartographic hillshade relief effect (hachures) electronically using modern DEM data?
I own a number of old cetral-European maps and I always liked the classic hand-drawn cartographic hillshade relief presentation that these maps feature. I am not wanting to reproduce the shading ...
4
votes
1answer
216 views
Multishading: bring them together to one Raster-Image
I made a multi-hillshade with 4 different light-directions and colors and stacked one above the other, each with its own transparency. Now I want to "save" the result in one raster-image.
Whats the ...
4
votes
2answers
340 views
High Mountain hillshade is not “natural”
after generalizing my DHM and extraction of different color-hillshades, I got something like this:
Its not very good, but I used the idea of Imhof generalizing and coloring the hillshade ...
4
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1answer
624 views
How should I correctly exaggerate a hillshade raster (ArcGIS10, Spatial Analyst)?
I once wanted to generalize a high resolution raster and instead of MEAN i accidentally selected the default SUM technique, using a cell factor 5 (Lidar DEM is 1m resolution). When I used this result ...
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votes
2answers
467 views
1'' DHM: Hillshade is too rough - how to “generalize”?
I got that hillshade from my DHM (I used the hillshade-module from qgis). For my purpose there a too much relief details (roughness). How can I get rid of them in QGIS or GRASS?
Thanks!
Martin
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votes
1answer
568 views
How to create a Hillshade model with multicolor “alà IMHOF”?
I would like to make a Hillshade-Model with multicolor "alà IMHOF". That means, I dont want a "usual" gray hillshade, I would like to use grey-blue and grey-violett from different sun directions.
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5
votes
2answers
772 views
Can shaded relief be “blended” with DEM colour ramp in ArcGIS to produce a more visually dramatic result?
Not being able to use true transparencies with ArcGIS colour ramps where only solid colours are allowed has me always wondering about how to improve the look of the surface in my maps without ...
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5answers
1k views
Is Hillshade option in ArcMap rubbish or is it me?
Here is a pretty pic of the raster I am using - with no effects applied - just the color ramp and historgram adjusted to show out all the relief - all be it in a very 2D way!
I have a raster layer ...
2
votes
3answers
205 views
Trying to make the private land white overlay hillshade but
I'd like to have anyone's feedback on this draft map I created. Tried to make the private ownership white but since it's RGB is not near to 255.
I've seen someone created this map similiar to it and ...
5
votes
1answer
215 views
phong lighting scheme in arcmap?
I have seen a few DEM/hillshades in published journal articles that use a phong lighting scheme which gives surfaces a metallic luster. Does anyone know how/if this can be achieved in arcmap?
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votes
4answers
2k views
Shaded relief from DEM in GRASS and QGIS
I have been trying to get a good looking shaded relief model out of GRASS and Qgis for a day or so now and just can't seem to get it. The biggest problem I'm having is the valleys look like ...
