The vertical and horizontal dimension of land surface

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33 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
30 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
17 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
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1answer
30 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 ...
0
votes
1answer
16 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 ...
2
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0answers
31 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?
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0answers
27 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 ...
0
votes
1answer
21 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. ...
2
votes
2answers
30 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
71 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 ...
0
votes
1answer
64 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, ...
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1answer
39 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 ...
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0answers
31 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
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0answers
36 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 ...
2
votes
1answer
71 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 ...
0
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0answers
44 views

Cannot assign name to resultant terrain using ArcPy so cannot save result?

Question of python in ArcGIS: I can not assign a name to the resultant terrain, thus I can not save the result. I'm new to arcpy. By a piece of script using SetNull() in Raster Calculator, I want to ...
2
votes
1answer
303 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 ...
1
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1answer
24 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.
2
votes
1answer
168 views

Cause of ERROR 000539: Error running expression?

The following errors in ArcMap are preventing me from moving forward: 1) In Raster Calculator using "Aspect": "%DEM_Aspect%" <= 90 or "%DEM_Aspect%" >= 270 ERROR 000539: Error running ...
3
votes
0answers
21 views

Cropping eudem with GDAL creates zig-zag terain

I have downloaded EUDEM (20Gb) 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 ...
1
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0answers
31 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 ...
0
votes
1answer
136 views

Wrong Terrain Height Information

I am getting negative elevation values from CesiumTerrainProvider (stk-terrain). For few locations the below code is giving negative elevation values, which are wrong, as I have checked those values ...
0
votes
1answer
74 views

Is there a difference between the two sets of QGIS terrain analysis tools?

Is there a difference between Raster/Terrain Anaylsis and the same features in Raster/Analysis/DEM (Terrain Analysis)? The two appear to do the same types of computations; are they the same or is ...
0
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0answers
53 views

Elevation Corridor Terrain Profiles

How to calculate a Max Terrain value of a profile over an area We have a situation where we are trying to generate a "max" profile, or a profile or extremely large width (in case 1) over terrain. ...
1
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0answers
43 views

texture fill doesn't display in ArcScene

My texture fill doesn't display properly in ArcScene but it does in ArcMap. What am I doing wrong? Help! ArcMap: ArcScene: The same texture fill has been selected in both ArcMap and ArcScene. ...
2
votes
1answer
449 views

Usage of Cesium Geoserver Terrain Provider Plugin for a single tile of SRTM90 data

I'm attempting to use Cesium Geoserver Terrain Provider Plugin for terrain visualization. I downloaded one tile from http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp address such as 42_05 region. I ...
4
votes
2answers
124 views

Software for amateur topographic surveys

I'm interested in doing rough topographic surveys using my tripod-mounted Brunton transit compass for azimuth readings and laser rangefinder (and maybe an optical level), so obviously going to be much ...
2
votes
2answers
248 views

Which Statistical Test to use?

I aim to determine whether there is a correlation between terrain variables (elevation, aspect and slope) and structural information acquired in forest survey. I have used ArcMap's extract multi ...
4
votes
2answers
358 views

How to create a raster tiff (dem / heightmap) from a mesh of xyz points?

I have to create a terrain heightmap(raster tif preferably) from mesh of xyz ungridded points(in geographical coordinates), I tried taking min and max of bbox of mesh and making width & height by ...
3
votes
1answer
89 views

How to export data from saga or tas into excel?

I want to derive terrain attributes from DEM with saga and whiteBox GAT (SAT). I have problem in exporting data into excel. would you help me?
2
votes
2answers
59 views

Return Image from WMS service

I asked this question, and I realize that I am going in the wrong direction. So, I would like to do this : var geom = new THREE.Geometry(); // push vertices here var some_material = new ...
1
vote
0answers
25 views

GRASS GIS and Liss4MX

i am working on grass gis. how to use grass gis for liss4 of IRS-P6.I have to do atmospheric correction for hilly terrain data.i would like to use grass's i.atcorr. may i know the dependencies and how ...
1
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0answers
52 views

Is there an api for world terrain/biome data?

I'm looking for an api where I pass a lat/lng, and get "Desert" or "Mountains" or "Ocean" back. Just the general biome of the area. Most of what I've seen involves getting tiles back, so you can ...
1
vote
0answers
56 views

What kind of methods are most commonly used to interpolate a relief?

I have got a topographic plan with height measurements which I converted to point shape file with height value in attributes. I was wondering, what kind of methods are most commonly used to ...
1
vote
0answers
142 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 ...
3
votes
1answer
136 views

ArcPy delete terrain: cannot be deleted

I can't get my ArcPy script to delete a terrain. If it exists, it should be deleted. However it throws an ERROR 000317: {path} cannot be deleted My script is a lot longer than this, but this ...
5
votes
3answers
327 views

How do I use the Terrain with Labels basemap in the Map constructor

Seems like all the other basemaps can be used in the esri.Map() constructor, but this one doesn't have a corresponding entry in the list of acceptable values. I've tried just "terrain", and it didn't ...
3
votes
0answers
316 views

Creating one DEM from multiple ASC files

I am struggling with this several days and now its time to ask how to do it in QGIS. I have very detailed 27 ASC grid files with overall size of 9 GB created from 1m contours of large area (600 m2). ...
2
votes
1answer
88 views

Query DEM Elevation at Point in QGIS

I'd like to be able to pull up a DEM (or create a mosaic of them) and simply query the elevation at points I click. Is this possible using QGIS?
0
votes
1answer
452 views

3D Analyst Line of Sight: what am I doing wrong?

As a relatively new user to GIS trying out 3D Analyst tools, I'm trying to run a Line of Sight which is not working the way I'd expect. Note I'm running the tool straight from the toolbox, no python ...
1
vote
1answer
105 views

Wireframe display of terrain in ArcGlobe?

I have successfully imported a terrain dataset into ArcGlobe which provides elevation values to the globe surface. Is there an easy way I can now change the symbology/display of the terrain/globe ...
0
votes
1answer
235 views

Why do I get these bands on my Height/Dem/Raster

I can't seem to get rid of them, and I've no idea (ok scrap that, I have a vauge idea) whats causing them. First an apology, yes this is quite a large pic apologies, but here goes: How to ...
7
votes
1answer
939 views

Bringing GIS data into Minecraft

A little off the beaten path...: Denmark has built a 1m:1block Minecraft World using real GIS data. Here's the home page, in Danish: http://gst.dk/emner/frie-data/minecraft/, and an ArsTechnica ...
5
votes
1answer
288 views

Generating a vector contour map of fictional terrain

Originally I had asked this on the Graphics Design SE but after some realization of the question I was asking, it's probably better to ask it here. I'm making a fantasy world map in illustrator that ...
2
votes
0answers
108 views

How to optimize color ramp for terrain

I'm working on a project to highlight LiDAR terrain on the web and part of the idea is to show the detail of the data at large scales. I've already read through the excellent Mapbox guide and I've got ...
2
votes
2answers
229 views

Terrain Accessibility map using GIS (ArcGIS or QGIS)

I need to make an accessibility map showing the walking distance based on the terrain and availability of road networks, could anyone point me in the right direction where i could learn to do so. ...
4
votes
1answer
1k views

How to create contours from smoothed DEM instead of using Terrain to Raster?

I'm fairly new to working with lidar and have been assigned the task of creating 2ft contours for the entire county using USGS-provided lidar tiles. Is there a significant difference in the accuracy ...
1
vote
1answer
795 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 ...
0
votes
1answer
102 views

How to obtain buildings base (Ground) Height from Esri Terrain Dataset?

How can I join Height data (surface, DTM) from terrain dataset to buildings polygons ?
3
votes
2answers
1k views

Is it possible to give 2d contours a Z-height from their attribute table in QGIS? (Or ArcGIS?)

I have a contour data file downloaded from UK Ordnance Survey, which gives 2d contours of an area in gml format (also supplied in .shp format) with the heights of each contour attached to the ...