The vertical and horizontal dimension of land surface

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2
votes
1answer
204 views

NASA SRTM: precipitous contour lines in TileMill

I was trying to make a nice looking print map of Bali (Indonesia) in TileMill. After creating a terrain layer (using this walkthrough) I noticed that the island's coastline was precipitous. Is ...
1
vote
0answers
29 views

Create Terrain Ruggedness Index (TRI) in QGIS

I just started to use raster files, and I want to create a Terrain Ruggedness Index (TRI), using QGIS. Which layers must I use? Do I need to create the "Input file (DEM raster)" (in: ...
1
vote
0answers
20 views

Flattening topography while retaining structures in QGIS?

I have a set of Terrain data in both DSM and DTM form. What I am trying to do is extract the features (buildings, hedges etc...) that have been removed from the DTM, but I don't want the topography. ...
2
votes
0answers
19 views

Line Layer seems to be floating and shifted after adding terrain effect in Cesium

I had made add a line layer using cesium. In which i had added a terrain effect using the standard cesium terrain provider as below var dataSource1 = new Cesium.GeoJsonDataSource(); var roads = ...
1
vote
1answer
99 views

3D OSM buildings seems to be floating and shifted after adding terrain effect in Cesium

I had made a 3D view of the osm buildings using cesium. In which i had added a terrain effect using the standard cesium terrain provider as below var viewer = new Cesium.Viewer('cesiumContainer'); ...
2
votes
0answers
37 views

How to show a 2.5D surface of raster above terrain layer in Cesium?

I'm developing an web application that will show surfaces of rasters and terrain. These rasters are on GeoTiff format. I learned from example cesium can show image overlays earth surface. The ...
2
votes
1answer
41 views

Remove terrainProvider from scene (ol3-cesium)

I'm using ol3-cesium for creating 3D globe and cesium terrain provider to show terrain data on globe its working fine. this.scene.terrainProvider = new Cesium.CesiumTerrainProvider({ url : "http://" ...
6
votes
1answer
188 views

In hydrologic terrain analysis is there a difference between “pits”, “depressions”, and “sinks”?

In hydrologic terrain analysis is there a difference between "pits" and "depressions"? For instance, Planchon and Darboux (2002) state The usual numerical methods for removing the depressions of ...
1
vote
0answers
59 views

Why do I get an error running Catchment Polygon Processing?

I am trying to run catchment polygon processing in ArcGIS 10.3, and this is what i get "error hresult e_fail has been returned from a call to a com component" Can you help me to debug this error?
6
votes
3answers
2k views

Where I can find world terrain data?

I need free terrain data for the whole world which I can import into TileMill. Is there some source where I can download them? Thank you.
3
votes
1answer
515 views

Converting contour lines to terrain dataset?

I have downloaded free DEM from the NET and I generated a contour line with 10 meter for interval. So, I just want to convert the contour lines to LAS point file to create a new terrain dataset. Is ...
1
vote
2answers
282 views

Unable to serve Cesium Terrain files

I am trying to generate 3d Terrain. I am serving the terrain files at localhost:8081 Here is the Cesium Code var viewer = new Cesium.Viewer('cesiumContainer', { baseLayerPicker : false, ...
1
vote
0answers
29 views

Terrain Profile starts a selected polyline-based graph in different directions

I´m trying to create some profile graphs with Terrain Profile in QGIS 2.10 Pisa, using LCP´s between a site and seven lithic deposits as polylines. When I select some of these lines, the graph starts ...
2
votes
1answer
73 views

Creating a Terrain from a Multipoint file if the “New Terrain Wizard” is missing?

I created a multipoint file using the tool LAS to Multipoint in ArcMap. After it was done processing, I went to my geodatabase, right-clicked and attempted to create a terrain. However, the wizard ...
1
vote
1answer
55 views

Free Digital Elevation (Terrain) Model of Europe or Germany

Is there any free (or not expensive) source of Digital elevation model of Europe or Germany with the resolution of 10 meters or better and vertical accuracy of +-5m or better?
23
votes
8answers
2k views

How to generate a random but believable digital elevation model?

Is there a way to generate a DEM, programatically or otherwise (arcpy or R?), that will feed into ArcGIS for further spatial analysis? Perhaps this needs to be broken down into smaller incremental ...
1
vote
1answer
51 views

Basic instructions for loading OS Terrain 50 data

Are there any basic instructions for using the OS Terrain data available online? I do not have an issue extracting - it is all sat in a folder ready to go. What I cannot work out how to do is to ...
3
votes
1answer
129 views

Looking for more realistic 3D terrain renderer than ESRI Arcscene

I am looking for simple suggestions of software packages that go beyond what ESRI ArcScene can offer. I want to create 3D terrain visualisations, particularly of orthophotos draped over high quality ...
4
votes
0answers
65 views

QGIS Profile Tool shows no profile

I have installed and followed the process to produce an elevation profile from the Route Profile plug-in in QGIS, but for some reason I am getting no profile to appear. The grids are from OS ...
1
vote
0answers
63 views

using openlayers 3 and three.js to use openlayers 3 map as texture

I am trying to use Openlayers 3 along with three.js to use openlayers output map as texture. I found that openlayers 3 is webgl based and so is three.js. So they must be compatible. What I have done ...
4
votes
0answers
36 views

Cropping EUDEM with GDAL creates zig-zag terrain

I have downloaded EUDEM (20 Gb) from http://www.eea.europa.eu/data-and-maps/data/eu-dem#tab-original-data When I try to crop it by GDAL using: gdalwarp -dstalpha -of EHdr -crop_to_cutline -cutline ...
2
votes
2answers
43 views

How can I extract flat surfaces from a DEM with GRASS GIS?

How can I use GRASS GIS to get the flat surfaces in this DEM into polygons? The picture is used to show the clearly defined flat surfaces.
0
votes
1answer
371 views

Issue with Cesium Terrain Provider

Even after adding blank terrain files at the specific directories : 0/1/ and 0/0/, I still get the error message and a blank globe. This is not an issue with CORS. I am using http-server (node) to ...
1
vote
0answers
78 views

Checking if Terrain Model has pyramids or data sources using ArcPy/Python?

I asked this question in the ESRI forums and got nothing but a lesson on LAS point cloud classifications — not even remotely what I had asked. I’m hoping someone here can point me in the right ...
1
vote
1answer
1k views

OpenLayers & Google Maps: TERRAIN not showing as baseMap

I have a problem with OpenLayers and Google maps: on this page: http://46.37.22.75:8085/public/ I'm loading Google maps TERRAIN with Openlayers.js, everything worked well for about 1 year, but now ...
6
votes
2answers
1k views

Has (ESRI) TIN been superseded by Terrain Dataset?

I've had version 10 for a few months but it wasn't until today that I really tested the 3D Analyst extension. (Other then visualizing data) I already noticed a lot of changes; a number of tools have ...
1
vote
1answer
184 views

Editing 3D object in ArcScene and exporting as a VRML file

This might be easy, but I'm a newbie in using ArcScene and I can't figure out how to do it. I have a 3D terrain model - srtm dem (*.tiff) file visualized in ArcScene. I need to add to this model some ...
6
votes
3answers
2k views

Finding elevation differences between adjacent pixels in ArcGIS Desktop?

Is there a way to determine what the difference in elevation is between two adjacent pixels? I am using an SRTM DEM to map faults. I am using the vertical error (>16m) as a criterion for the ...
0
votes
0answers
40 views

different results :Slope analysis in qgis vs ArcMap

I want to make slope analysis on geoTiff. I am using ArcMap and qgis. But i get different results, but both are in degrees. I ArcMap i recive range from 0 to 42 degrees, but i qgis it from 0 to 17 ...
1
vote
1answer
50 views

How to write a python code for Add Feature Class To Terrain using interface?

I am trying to write a code that creates a Terrain from lidar data (LAS). The problem is that the inputs are in Feature Dataset in GDB but I don't know how to write code so that using an interface. I ...
0
votes
0answers
27 views

Enclosing building models from bottom (Missing GroundFeatures) using FME?

I have 3D building model of the city and I would like to export it to proper CityGML model. I am trying to find out, how to make an intersection of building and terrain in order to make ...
3
votes
1answer
177 views

Can 2D polygon be used as hard breakline for terrain in ArcGIS Desktop?

I've been working with TINs for years and have only ever been satisfied when using 3D polylines for breaklines. I am currently transitioning to using terrains and after reading the documentation in ...
9
votes
5answers
28k views

Creating profile cross-sections in ArcGIS Desktop?

Because the default 'Profile Graph' tool was not sufficient, I wrote a custom VBA script that creates scaled and exaggerated profile cross-sections in ArcGIS but I need more features: Visualize more ...
1
vote
0answers
31 views

How is “flat” defined in SAGA

SAGA has a feature that determines flats. Does anybody know how they define a flat? If I start with a raster, each pixel is flat - so it has to be more sophisticated than that. I would like to be ...
1
vote
1answer
76 views

is there a gis web engine for displaying video on terrain?

i desire to display video on a globe surface on it's geographic position context. i prefer an opensource solution for displaying the video on map elevation model in web GIS application, but could ...
1
vote
0answers
70 views

Weighted averages: accounting for grid cell surface variation in proportion to the cosine of its latitude

Non-geographer learning GIS here. I'm using ArcGIS Desktop v. 10.2.2. I have a 30-arc second Terrain Ruggedness Index (TRI) raster file, and I want to measure the average ruggedness within each ...
2
votes
0answers
67 views

Using Terrain Profile plugin with an interpolated raster

I am very new to QGIS and the goal of this exercise is to view an elevation profile of a river from a set of discrete points taken from surveying records. Steps taken: A vector layer was created ...
0
votes
0answers
146 views

Out of Memory and TIN internal processing error ArcGIS

So i have been developing a python script to streamline the process from converting a raw XYZ file to a full blown terrain file. However, in the intermediate process, I am performing a surface ...
0
votes
1answer
44 views

ArcGIS 10.0 height statistics for polygon features: zonal statistics vs interpolate shape

I'm performing a fairly routine task, which is to add height information (from a 50m DEM) to survey polygons to work out mean height, as well as max and min. I've noticed that zonal statistics ...
1
vote
0answers
29 views

Problem with making raster from Aspect and wind direction data [duplicate]

I know its not correct to ask for work flow, but I am learning by doing and now I don't know how to move on. I'm trying to make new raster which will represent the facing sides of hill around a ...
2
votes
0answers
119 views

High Resolution Terrain Data for the Philippines

Where can i download Philippines terrain data that is better than the 30 m ASTER global dataset?
3
votes
2answers
91 views

Cesium terrain tiles too high by roughly 30m

I'm using the NED 1/3 arc second data set to generate tiles to zoom level 15 for Cape Canaveral in Florida, and finding that the terrain looks accurate in appearance, but the elevation is too high by ...
0
votes
1answer
54 views

Unable to serve .terrain files in cesium sandcastle

I am learning 3d terrain generation using CesiumJS. I generated .terrain files usind Cesium terrain builder and kept them in 'cesium/apps' directory for testing purposes and to avoid CORS issues. ...
1
vote
1answer
127 views

Cesium Terrain Builder : Could not open GDAL Dataset

I am trying to run Cesium terrain Builder on Ubuntu 14.04. On running ctb-tile dem.tif I get the error: Error: could not open GDAL datasetERROR 4: `dim.tif' does not exist in the file system, and ...
1
vote
0answers
53 views

How to create “undulating terrain” for playground in ArcGIS?

How could I create undulating terrain in ArcGIS? I know I could create it by creating a TIN model but first I need to have "input data" - shapefile with Z (height in attribute). Is there any way I can ...
1
vote
1answer
38 views

How to do unit conversion on a Terrain dataset?

I was wondering if there is a way to change the elevation units of a Terrain dataset (from example from meter to feet). Any idea/guidance is much appreciated.
4
votes
6answers
3k views

shadow simulation from buildings [duplicate]

is it possible to use hillshade function in ArcMap to calculate shadow areas of buildings or simulate shadows of buildings, using DSM of the buildings and the sun angle and azimuth?
2
votes
1answer
158 views

How to get mean geographic direction of a polygon in QGIS?

I have a raster height model and would like to calculate the horizontal geographic direction (north, east, etc. - orientation) of each cell, then calculate then the mean value of all these cells in ...
3
votes
1answer
1k views

Google Earth import terrain

Today, Google Earth allows you to import images to overlay on existing terrain. Is it possible to import custom terrain to replace default terrain in Google Earth? There doesn't appear to be any ...
2
votes
1answer
1k views

Creating 3D terrain/model from contour lines, preferably using Open Source GIS?

I am looking to create 3D terrain from a contour map that I have (originally inside a PDF). The contour lines are able to be viewed as paths in Adobe Illustrator. There are two types of lines: 7m and ...