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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20
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2answers
1k 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 ...
13
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5answers
2k 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 ...
12
votes
4answers
4k 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 ...
9
votes
3answers
1k 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. ...
7
votes
3answers
742 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 ...
7
votes
2answers
2k 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 ...
5
votes
1answer
270 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?
5
votes
1answer
340 views

Generate hillshading with GDAL, and respect nodata

I'm still trying to nut out this problem of merging overlapping geotiffs. From the original dataset (here, a 20m resolution digital elevation model of the state of Victoria), I have reprojected it ...
4
votes
1answer
123 views

Weird raster visualisation

Using the hillshade tool (Arcmap 10) on a 30m SRTM raster downloaded from NED the result is the one in the picture. Why are there those crossed lines all over the raster? How could I remove them? ...
4
votes
1answer
2k 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 ...
4
votes
1answer
308 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
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0answers
42 views

How to calculate an Illumination raster for fire ignition danger analysis?

I am doing a fire ignition danger analysis using this equation that I found in Millington (2012) http://www.jmecology.com/wp-content/uploads/2014/03/33-42-MILLINGTON.pdf IR = 4H + 3V + 2I – E Where: ...
3
votes
2answers
1k views

1'' DHM: Hillshade is too rough - how to “generalize”?

I got this hillshade from my DHM (I used the hillshade-module from qgis). For my purpose there is too much relief detail (roughness). How can I get rid of this in QGIS or GRASS? Thanks! Martin
3
votes
2answers
261 views

cloud shadow detection

I am trying to detect cloud shadows in Landsat images. I came up with producing good shadows and cloud masks. Now I'd like to implement my cloud mask adding cloud shadows. Do You have a good idea to ...
3
votes
3answers
1k 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
3
votes
1answer
50 views

Grid-like artifact visible in contour layers?

I am creating contours from an Aster DEM in ArcMap 10.1 I see a grid pattern appearing, particularly in areas of dense contours: I see the same artifact if I create a Hillshade layer so presumably ...
3
votes
2answers
261 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 ...
2
votes
4answers
579 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 ...
2
votes
2answers
155 views

Scale and Z factor have no effect on hillshade analysis in QGIS

I used an SRTM DEM to create a hillshade in QGIS 2.2.0. However, the resultant hillshade seems to be vertically exaggerated. Also, changing the settings for scale and z-factor does not have any effect ...
2
votes
1answer
321 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 ...
2
votes
3answers
251 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 ...
2
votes
1answer
26 views

Finding DEM/HIllshade sources California

Creating watershed maps for schools. I want to color ramp the elevation to show low and high points. What kind of files do I need and where to find them?
2
votes
1answer
135 views

Several algorithms done for topographic correction => black spots - how to solve?

I have done several algorithms for topographic correction in R including simple cosine, Minnaert, SCS. The input data aspect and slope for the hillshade raster have correctly been done in radians. The ...
2
votes
0answers
40 views

Improve gdaldem hillshade output (lighten up flat parts)

I have a hill-shading that I made using gdaldem hillshade which is already pretty good. I used the option -alt 60 to get nice contrast, but the problem is, that with lowering the light-source, also ...
1
vote
3answers
201 views

SRTM NASA hillshade grainy appearance

I'm trying to create a hillshade surface from SRTM files downloaded form Earth Explorer, but the appearance is not the expected. It has a grainy surface that I would like eliminate to have a ...
1
vote
1answer
76 views

A nice display of hillshade and my geologic map

i want to create a nice hillshade map covered by a grid or RGB map, with similar colour results in ArcMap like this: Is there a way to achieve this in ArcGis without transparency settings which ...
1
vote
1answer
304 views

QGIS hillshade error “GDAL provider: Cannot open GDAL dataset ”

I am using a DEM and using menu Raster > Terrain analysis > Hillshade. When I type a simple output file name "MyHillshade" and then click "OK", I get a two-part error message that says: "GDAL ...
1
vote
1answer
123 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. ...
1
vote
1answer
43 views

Wrong Coloramp function in ArcGIS 10.2.1

I want make elevation map use new method Learn a new method But i have problem with Coloramp function whatever the choice of color ramps. What's wrong?
1
vote
0answers
65 views

Mosaic hillshade function does not save statistics/histograms in ArcMap 10.2.1

I used ArcGIS 10.2.1. on Windows 8. I did hillshade function for DEM and Calculate statistics. Every time I go into ArcMap statistics strays: I try to add this function on mosaic but didn't worked. ...
1
vote
0answers
81 views

Smooth hillshade in all scales in ArcGIS Server 10.2.1

I publish relief map on server and view his on arcgis.com map. But in export i can change dpi from 96 to 300 and result smooth Any ideas how i can do so that the hillshade was smooth in all ...
1
vote
0answers
149 views

Strange gdaldem hillshade artifacts

I've downloaded 9 chunks of 1 arc-second NED in IMG format from the National Map. I'm trying to create a hillshade from them. I'm using: GDAL 1.10.0, released 2013/04/24 First, I combine them and ...
0
votes
1answer
176 views

Hillshade is block grey ArcGIS

So I am trying to create a hillshade on my DEM because I need to be able to distinguish features which I can't do in its current state (see picture). However, when I add the hillshade, it adds a block ...
0
votes
1answer
33 views

Interaction with two variables as parameters, saving the raster properties output into a table (.dbf)

The draft of the model below TASK: I need to calculate the percentage of river channel that is covered with shadow in each timestep RESOURCS: I have values for azimuth and elevation of the sun ...
0
votes
0answers
46 views

How to add hillshades to a raster map?

I have a raster map without hillshades and want to add Hillshades derived from the SRTM90 dataset. I am looking for a tool, that can handle that as automatic as possible? I don't want to bother with ...
0
votes
1answer
47 views

going from hillshade to percent shaded (gdaldem)

I assumed hillshades output percent shaded (scaled to 255) at the given azimuth and altitude but this is incorrect. A flat raster at 80 degrees altitude has a maximum value of 251 instead of 255. How ...
0
votes
1answer
76 views

Make permanent layer in ArcMap, Image Analysis Functions to display hillshade

I use ArcGIS 10.2.2. I want to make relief map, so that it looked good at all scales. I use hillshade function but after Export data relief looks good only in one scale. I use this method Using ...
0
votes
1answer
34 views

How do you set sea level elevation to white in terrain analysis?

I have ASTER files I am working with to create a shaded relief background for some other vector shapefiles. In experimenting with different color-elevation options, I am unable to have the Terrain ...
0
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0answers
72 views

determine the catchment area from dem or hillshade [duplicate]

I want to determine the catchment area of river from hillside. Is there a plugin that I can use in qgis ?
0
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0answers
91 views

Strange black pixel on edge when generating with gdaldem -hillshade

I'm getting a strange result when I'm generating an hillshade with the gdaldem hillshade command. Here is my command (see the compute_edges parameter): ...