Questions tagged [elevation]

The vertical distance of a point or object above or below a reference surface or datum (generally mean sea level).

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117 views

Determining length of roads that fall under low elevation using ArcGIS Desktop? [closed]

I am working on a project on sea level rise impacts of roads. Basically I need to determine length of roads that fall under low elevation (from 1m to 5m elevation). I have a DEM file and road ...
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53 views

How to input Shapefile point data into a raster and have the raster adjust to the new data?

I have a shapefile with elevation data at specific points. I also have a raster that has incorrect elevation values, but the transition between pixels is what I need. Is there a way to put the values ...
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829 views

Web site to show GPX with elevation?

I notice that a GPX file contains not only lat + lon but also elevations: <trk> <name>Some route</name> <trkseg> <trkpt lat="50.64536" lon="3.05657"> ...
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Using Arcpy, how can I determine min and max elevation from a raster DEM layer within my current extent?

Using Arcpy, how can I determine min and max elevation from a raster DEM layer within my current extent? I'm currently using Data Driven Pages to centre the layout on each feature extent. I need to ...
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2answers
91 views

digital elevation model data help?

I know little about geographic data. I am trying to get a file of elevation data for the United Kingdom so that I can import it into a CAD program and convert it to an *.stl or *.dxf format. I ...
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111 views

What dem data are Flex Viewers using to create elevation profiles?

I asked a similar question a year or two ago here: Can Elevation Profile data in Arc's Flex Viewer 3.0 be exported? which appears to not have an answer. Another question regarding the Flex Viewer (3....
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1answer
551 views

ArcGIS 10.2 Viewshed not using Z Value?

I'm currently trying to produce a line-of-sight map of a tower with no results. Every time I run the viewshed tool, the program uses the base Z value of the DEM. I use the DEM Raster for the ...
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5k views

Project points to a vector layer and get z elevation at QGIS

I have one point file and one dtm vector file (with elevation contours as well as point elevation information). How can I project points to the vector file and get z elevation of them?
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13k views

Calculate maximum and minimum elevation for a polygon layer from a DEM [duplicate]

I have a polygon layer and would like to know the min and max elevation within each polygon. My elevation layer is a digital elevation model. I'm not quite sure how to extract that information. I am ...
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15 views

How to replace an ArcGIS elevation service with a GeoServer elevation service

I'm trying to remove a dependency on ArcGIS in our system and I'm trying to replace ArcGIS's ImageServer with a counterpart on GeoServer. Here's what I did so far: Downloaded a sample elevation ...
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Are WGS84 LatLon coordinates and EGM96 LatLon coordinates the same and difference for [LatLonEle] is elevation only?

Does WGS84 LatLon coordinates and EGM96 LatLon coordinates are the same? Is difference for [Lat;Lon;Ele] is in elevation only? If I have, for example, a [Lat;Lon] point in WGS84, I can take ...
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49 views

Getting elevation data from DEM

I'm trying to extract elevation data from a DEM file but I can't make it work. I want to extract contour lines from a given area, and label those lines with the proper elevation value. The problem I'...
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22 views

How to get elevation value in CSV format in R from raster SRTM DEM file?

I am trying to get elevation value in meter using R programming. I have loaded raster library in rstudio: elevation <- getData("alt", country = "BD") How I can get those value with lat lon? ...
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39 views

What is meaning of scale on x and y axis of image using matplotlib

I am finding elevation of a region using richdem. Can somebody tell me what is the meaning of the scale which is on the x and y axis of the image? import os import numpy as np import matplotlib ...
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29 views

Seeing heights in Landsat 8

I have downloaded some DEM from Landsat 8 from usgs website. when I opened the compressed file I saw some Tiff files and two text files. I opened the txt file using ArcGIS 10.7 and it contains many ...
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1answer
43 views

Adding building/woodland elevation data to existing OS Terrain 5 DTM in ArcGIS Desktop [closed]

Would someone be able to give me the stepped process showing how to add building/woodland elevations to an existing DTM raster in ArcMap? I seek this in order to prepare a surface model for a ...
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2answers
58 views

Android app to get altitude of places to use in field visit?

I want to verify the height of the ground which is provided to me with the help of an app if available. Of course, I am aware an app will not give me exact value but for me, it works if it shows ...
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1answer
643 views

Importing elevation data into prexisting KML in Google Earth Pro?

I am working on a project where I need the z value (elevation) of a set of data points. Is there a way to assign elevation data to a KML in Google Earth without doing it manually for each point? I ...
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198 views

How to separate or cut the elevation from bathymetry raster TIFF file with vector layer coastline in QGIS 3.4.3?

I have a raster GeoTIFF file downloaded from GEBCO 2014 which contains bathymetry and elevation. I need to split in 2 layers the raster GeoTIFF file (layer: Bathymetry and layer: Elevation) using ...
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2answers
713 views

How to extract Z data from a shapefile from points on another separate layer QGIS

I have two layers; one with elevation data (m), and the other with roads (derived from points via points to polyines). I want to run a spatial query that basically extracts the elevation data from the ...
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1answer
45 views

Showing roads that are below 10 ft elevations using ArcGIS Desktop?

I have point elevation data and road layers for a region. How do I show the road sections that are below 10 ft elevations? I am using ArcGIS Desktop 10.3.1.
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1answer
57 views

Identifying the greatest value point within each polygon

I have a series of polygons (4,000) and a series of points that exist on the perimeter of each polygon (3 to 5). The points refer to the elevation value which has previously been extracted from a DEM ...
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2answers
58 views

Editing elevation in ArcGIS Desktop?

I have a raster layer that covers a large area (three cities). When I load the raster layer into a 3D visualizer, there are multiple areas with a drastic change in the slope rather than a gentle ...
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1answer
3k views

Creating Elevation Profile from Line Shapefile of Contours using QGIS?

I have a line shapefile that contains contour lines. The attribute table of the shapefile has a field that gives the elevation of each line. I would like to draw a line across the contours and get an ...
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103 views

Elevation shading of linear feature compared to surrounding ground level in QGIS

I have a digital elevation model (DEM - geoTIFF) in QGIS 3.2. There is a linear feature (earth bund/wall) in the DEM that I would like to shade/colour based on its elevation above the surrounding ...
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149 views

Getting elevation profile graphs along parallel interpolate lines using ArcGIS 3D Analyst? [closed]

I'm new to ArcGIS. I have used "Interpolate Line" tool in the 3D Analyst Toolbox to get an elevation profile graph. How can I create several parallel interpolate lines, maybe with specific distance ...
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1answer
35 views

Two raster classes according to cut-off elevation using ArcPy?

I've defined a python function to take input raster and elevation and output path. The function should return raster with two values 0 for elevation equal to and greater than given elevation and 1 for ...
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1answer
250 views

How to correct the elevation of the raster?

While comparing the DEMs of relatively small area raster (1) obtained of UAV data and (2) EU-DEM elevation model, I spotted around 30 meter difference in elevation between them. Since no GCP was ...
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1answer
440 views

Looking for topographic map of Bogota, Colombia, with elevation contour lines [closed]

I'm looking for a topographic map of Bogota, Colombia; specifically, we want to get the elevation contour lines, and export that layer to CAD. If anyone knows of any free places to find this data, we ...
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1answer
165 views

Convert elevation

I have a big trouble with a DTM. I have original DTM with SR WGS84/32633. Now I want merge at it a new DTM create from LiDAR data, but this (new DTM) have elevation that is 40/42 meters high that ...
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1k views

Extracting values from raster to get elevation values in R?

I am trying to generate an isoscape using IsoriX in R. Here how my data looks: > head(dataC) siteID long lat animalID species tissue.value 1 A -5.88 53.82 CC1_33.2/1_15 ...
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1answer
341 views

Line feature with elevation points?

I need done seems to be a simple task, but I cannot find out how. I want to create grid lines for a specific area at a specific angle (which is the easy part). Now I want on every gridline to be ...
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1answer
209 views

Finding highest path of DEM or contours file within area using ArcGIS Desktop?

I would like to create a polyline from one specified point to a target point. In between, I'd like to the vertices to fall on the highest point of elevation of that Y coordinate. Essentially, this ...
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1answer
341 views

Elevation profile extraction to excel using ArcGIS from DEM in a tiff format

I have an SRTM image in .tiff format downloaded from USGS website and I want to extract elevation along a path to a Excel file in the form of distance vs elevation or lat,long. vs elevation. Can ...
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1answer
889 views

Height map free API

I need to recreate a landscape in 3D or real World areas by using WebGL technology. The typical area I need to get height map for is about 1km x 1km and resolution should be as much accurate as ...
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1answer
411 views

Assigning Z Value to DEM Raster

I am working on projecting a DEM raster in ArcScene to drape some 2D imagery over it, and ran into a snag. Upon further analyzing my DEM TIF file, it does not have an attribute table, which lead me to ...
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1answer
553 views

Convertion of a .dem file to coordinates and elevation

I have a .dem-file with elevation data of an area and I am looking to programmatically convert this data to coordinates and elevation in C++. After a lot of searching, it looks like GDALTranslate ...
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1answer
174 views

Add height/elevation in generated sql files from osm2po

I am using osm2po to generate a routable network (by importing .sql files from osm2po into a PostgreSQL/Postgis database). This works great using the post process filters PgRoutingWriter and ...
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2answers
880 views

1ft contour shapefile displaying in meters

I generated a shapefile that has 1ft contours. It works great when imported to QGIS except the elevation labels are displayed in meters instead of feet. I've found two places to select feet as the ...
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1answer
47 views

GPX to Feature loses elevation?

I have been sent a GPX file to create a trails network on arcgis. When I run the GPX to Feature tool the elevation attributes are all zero, however when I view the GPX file on an online view, there is ...
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1answer
260 views

Creating an elevation profile along a KML road based on ASC files

I want to make the elevation profile of a road in KML. I've found this online tool but its does not gives accurate elevations. I already have .asc files of the whole area that includes the KML route ...
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1answer
1k views

Get Elevation of XY points [duplicate]

I am working with ArcMap 10.3. I have imported DEM files. When I imported the files they had the extension of .DDF. I would now like to be able to take a list of XY coordinates and, for lack of a ...
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1answer
120 views

How do you identify cuttings / crevices from a DTM or DSM using ArcGIS?

I am trying to identify where cuttings and crevices exist by using a DTM or DSM. My ultimate aim is to find where roads and rail lines sit within a cutting i.e. the land either side of them is higher ...
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1answer
173 views

GRASS 7 Cost surface and elevation points development

I'm a new to GIS and I'm trying to develop an optimal path across an area by using GRASS 7 features. It is very similar to the task given here. The problem is that I don't have any data with ...
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1answer
278 views

Regarding ARCGIS Curvature values [closed]

I originally had a DEM .tif raster in Decimal degrees. I projected it into a PCS with the spatial reference in ArcGIS as: WGS_1984_UTM_ZONE_44N Then, I took the Curvature tool and with a Z-factor of ...
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1answer
537 views

Generating elevation 'database' from NED IMG data

I'm starting to work with the NED 1/3 and 1/9 arc-second data. I've been using gdal in Python and QGIS to do some basic conversions of the raw .IMG data from USGS. My goal is to get elevation data of ...
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1answer
157 views

ArcGIS10 Highest point via polygon features

I am using ArcGIS 10.0 with 3D Analyst, Spatial Analyst and Military Analyst. I feel like I am halfway to solving a problem but do not seem able to completely solve it. I have a polygon shapefile ...
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0answers
32 views

How to add Elevation to a QGIS 3.12 attribute table for shapefile points

What code do I use in the Field Calculator of the Attributes Table within QGIS 3.12 to generate the elevation of shapefile points in feet?
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9 views

Global Mapper - How can I export point elevation from file .kmz or kml?

I want to get point elevation from file like pic below? Anyone know about it! Thank you!
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10 views

quite different results in spatialEco::tpi with circular and rectangular window

In R, I have an elevation raster. I want to calculate the topogographic position index using the spatialEco::tpi function. The CRS of the elevation raster is "+init=epsg:5677"; the CRS unit ...

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