Questions tagged [z-value]

It is the vertical position of a 3D coordinate.

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How to reflect Z-Value in Derived [closed]

I'm seeking the help how can we make the Z value reflect in derived part.
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21 views

Creating a 3D polygon layered over a DEM

I have a polygon which I have draped over a DEM raster layer so that it has z values matching the terrain underneath it. I now want to turn this polygon into a 3d shape where it is 5 meters tall with ...
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2 votes
1 answer
53 views

Move points to a Z-value?

I want to export a 800k points, which correspond to a DEM (terrain elevation) to Rhino. Currently, I tried to export a CSV with X,Y,Z coordinates based on the point attributes, however, there seems to ...
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QGIS : Z value from Exported Data (NOAA)

I open the ENC Direct data (any file) (https://www.charts.noaa.gov/ENCs/ENCs.shtml) in Arcmap using Esris' free S-57 loader extension and I'm able to see the SOUNDG_P layer and can display the Depth. ...
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Create custom z values for a line in 3D view

I have a line which I load in the 3D view but want this line to not be on the ground but rather in the air at a certain height above ground.
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Check if Geometry Arcpy Object has z values

I need to know if an arcpy geometry object has z values. I have tried without success to use the has_z attribute, since to create them you must use and I have also tried to verify if the first point ...
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Getting ArcGIS Pro's default elevation data (z-value) as layer

ArcGIS Pro displays coordinate values and z-values (elevation) as part of its basemap when moving the cursor across a 3D scene. This information is supplied by the WorldElevation3D/Terrain3D elevation ...
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Calculating difference between z-value and elevation

I have a project in ArcGIS Pro, with DEM file implemented, so I have the elevation figures. Next, I have a polygon, that has certain z-value inserted (non-constant, varies from point to point). Now, I'...
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101 views

Remove M value & Z value from shapefile JavaScript [closed]

Is there a way to remove the m value and the z value from a shapefile using JavaScript "leafletjs & shpjs”?
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Extracting elevation value (z-value) from 3D polygon at given point with QGIS

I am working with surfaces that limit the growth of buildings or structures near airports, for this I have modeled a series of regulatory surfaces that define the maximum permissible limit that an ...
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5 votes
1 answer
294 views

Adding z-value to the triangulation output from the TIN interpolation in QGIS

For a project I'm working on I need to do a triangulation over points (csv) or lines (dxf). When running the TIN interpolation from the processing toolbox I save the triangulation as a temp file. This ...
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Getting altitude with Trimble TDC 100 and QField

In our company we got Trimble TDC 100 and install QFlied for data collection. We collect points and polylines. Our aim is to get vertex and points while saving their altitude (height above the mean ...
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4 votes
1 answer
71 views

Adding Z-dimension point to layer

I have a point. I want to add to a Point layer in QGIS 3.16, but I can't get the Z-dimension working on my layer. The point is created but has no z-value... coord = qgis.utils.iface.activeLayer().crs()...
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1 answer
55 views

Updating Z values on points using UpdateCursor

I have created the following script, which moves the points from my_input_points_fc to my_output_points_fc by user input Furthermore, the z-values in my_output_points_fc should also be updated. ...
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3 votes
1 answer
141 views

Using Set Z-Values in QGIS Processing Modeler

I have a set of contours that I am trying to automate a process on. This process clips the contours by a boundary, sets z-values based on the elevation field, and then exports those contours as a dxf ...
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1 answer
180 views

Interpolating Z at polyline vertices between known Zs

I have polyline strings with vertices of known elevation / z height and intermediate vertices with null/zero height. Known Zs are spread throughout the line. I'd like to be able to populate the z of ...
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1 answer
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I need to remove Z dimension on spatial column (ST_GEOMETRY) with Esri on Oracle using the PL/SQL packages

I need to remove Z dimension on spatial column (ST_GEOMETRY) with Esri on Oracle using the PL/SQL packages I need to do the following, but using the ESRI PL/SQL packages on Oracle. I have used a ...
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ArcGIS automatically converting Z units when no Vertical CRS is defined

I have seen this on several tools, but it was most obvious to me when using calculate geometry in the attribute table. I have a point dataset that has Z values, but no VCS defined. I then used ...
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1 answer
48 views

max value of a field as variable

With the following script I was able to determine the maximum values of a column [POINT_Z] for certain groups from [ID_1]. arcpy.MakeFeatureLayer_management(inLAS[:-4] + '_POLE_POINTS.SHP', "...
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4 votes
1 answer
889 views

Adding z value vertices from a point layer to a line in QGIS

I created a point layer from a line using Vector geometry/Extract vertices in the Processing toolbox. The purpose is to extract the elevation from a DEM into the points corresponding the vertices and ...
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1 answer
245 views

set z-value from table

In qgis 3, postgis, no DEM and zero python knowledge. I've got linestring 3d but Z coordinates is empty, Z-values are stored in table. Z1 for the first node, Z2 for the last node. I found a lot of ...
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7 votes
2 answers
1k views

Adding z-value attribute to lines

I have a shapefile of 200 lines (all connected) with the coordinates x and y and a DEM raster. I would like to give the z value to the lines by taking it from the raster. I have read several ...
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4 votes
1 answer
185 views

Difference between two Z-values extracted using "Extract -Z values" tool in QGIS 3

When I run Extract-Z tool (vector geometry) and select Q3, I get two values for each object: In many cases, the two values are almost identical, but in some, they differ quite a bit. There is no ...
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1 vote
0 answers
54 views

QGIS: interpolate difference in Z-value on enbankments

I have two layers: 1 polygon layer with a theoretical profile of a harbour. 1 pointlayer with output from my multibeam echousounder. I made a new pointlayer with a Z-difference between the two ...
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Adding minimum point Z of polygon using ArcGIS Field Calculator?

In the middle of a ModelBuilder tool I created, I have a Z enabled feature with multiple polygons. I want to add on a specific field of this feature, the lowest Z value of each polygon. I know this ...
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5 votes
1 answer
314 views

Calculating real length and slope of roads

I have collected points alongside road in form of csv files with z-values. When imported in QGIS I used Set Z value and Points to path to make line. When I use right button in Identify Features tool I ...
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2 answers
237 views

Cannot read pixel value from DTM raster with QGIS

I am using this DTM: http://ags.cuzk.cz/arcgis2/services/dmr4g/ImageServer/WMSServer?request=GetCapabilities&service=WMS At ArcGIS I am able to ready pixel value of the raster but at QGIS it ...
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0 answers
33 views

Merging elevation values of multiple point shapefile

In ArcMap I have thousands of points with elevation values from an aviation route. This route is stored in a multiple point shapefile. I made a polyline shapefile based on the route x, y locations. Is ...
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7 votes
1 answer
487 views

Using Z-Values instead of attribute Z?

To locate any vertex, it is spatially described with x and y coordinates - of course. You can also add Z and M values - but what is the advantage to use the Z in the vector instead of a attribute Z in ...
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96 views

How to manually input decimal value into z-coord in QGIS

If I want to manually input a decimal value to Z-coord in QGIS, there's no effect. Only integer values are saved in nodes editor. Operating system Ubuntu 18.04, QGIS 3.6, locale: poland, data and ...
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2 votes
2 answers
184 views

write z-value from polygon layer to point layer in QGIS

I have two layers: 1 polygon layer where the depth of an area is written in the database (as DRVAL1) and and where the depth is exported as a Z-value to the geometry. 1 point layer that I use to plan ...
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1 vote
1 answer
478 views

Cannot solely remove M value of Shapefiles

I have a couple of Shapefiles which are of geometry type ZM (like PolygonZM, MultiLineStringZM, etc.), however my database (a PostGIS database) is of geometry type Z (like PolygonZ, MultiPointZ, etc.)....
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5 votes
1 answer
914 views

QGIS: use geometry from different layer in symbology expression

I have a project with multiple layers. The purple dots are from a pointfile with the symbology-expression: z($geometry)> '14.5'. (so it only displays a purple dot when the Z-value is more than 14....
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1 vote
0 answers
90 views

Calibrate routes not lining up with calibration points [closed]

I am currently building a model that calibrates Z and M values from Cross Sections for a stream. Z being the 100yr flood and M being the station number. What's happening is the vertex on the stream ...
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2 votes
1 answer
171 views

Error when get the Z value to point from the attribute in QGIS

I have imported point from a csv file with the xyz coordinates in the attribute like this in QGIS. And now I want to add Z value to the point. I try to use v.to.3d to add Z value but I get the error. ...
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1 vote
1 answer
702 views

Extract Z-values from multipoint data

I'm using ArcMap/ArcScene 10.4.1 I am trying to extract z-values out of the file in the picture below, but can't find any way to do it. The height is different for the points, so it has z-values, but ...
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-1 votes
1 answer
50 views

Reading PostgreSQL data with z- values in MapInfo?

I can read the tables with MapInfo from postgreSQL database but not the objects in the map. Data is with z values.
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2 votes
1 answer
467 views

Assigning attributes values to PointZM and convert to LineZM Geometries in QGIS? [closed]

I have elevation and measured values in attribute table of points layer. Is there a way to convert this layer into PointZM (with elevation and measured) and assign elevation and measured values to ...
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3 votes
1 answer
579 views

How to get z coordinate of a point using pyqgis

When I edit a vector layer in qgis, I select a lineString using Node Tool and I can see z coordinate of points in "Vertex Editor". In the image,we can see x,y,z coordinates of a list of points. But ...
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5 votes
1 answer
10k views

Assign z values to depth curves in QGIS

I'm new to QGIS and working with GIS in general (student of architecture), so please bear with me. I have obtained shapefiles with topographic curves of an ocean floor. My intention is to export ...
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  • 153
2 votes
2 answers
1k views

Z-value Error in ArcGIS Collector

I have a feature layer found in this map: http://arcg.is/0L8SS5 which is to be used with Collector as a part of a classroom activity. The feature layer is producing the error message "The shape must ...
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0 votes
1 answer
824 views

How to add TIN surface Z values into Z field of line vertices in ArcGIS Desktop?

I want to transfer Z values of TIN surface into Z field of line vertices. This line feature class is covered by this TIN surface. I used interpolation shape tool but this tool is disrupting line ...
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1 vote
0 answers
169 views

Transferring Z values into vertices in ArcGIS Desktop? [closed]

I am rookie about vertical issues. I have 2 parallel line feaure classes, one of them has Z values in vertices and I want to transfer these z values to the another line's vertices. It is ok that I can ...
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4 votes
1 answer
2k views

Creating and reading z values (coordinates) with pyshp?

I am trying to parse an input shapefile which consists of multiple polygons and want to create a new shapefile from this with added z values. Each polygon of the input shapefile is defined by multiple ...
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  • 153
1 vote
1 answer
155 views

Update Z values on a line

I'm using ArcMap 10.1. I want to select all vertices that contain z values and decrease their value with -0,155 meter but I dont want to change vertices that have the value=0. With this script I ...
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3 votes
1 answer
2k views

Projecting raster z-values from foot to meters?

I have a DEM raster (cell size 2.5*2.5). The spatial reference is lambert_Conformal_Conic_2SP and linear unit is Foot_US (0.304801). Values for DEM was from 879.6 to 1426.78. I wanted to reproject ...
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1 vote
0 answers
37 views

How can I verify the z values of my countour line file in ArcGIS/QGIS? [closed]

I have a shapefile with countour lines and I want to verify if the z value for each countourline is correct when compared with their neighbors. How can I do that in ArcGIS or QGIS?
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2 votes
2 answers
151 views

Elevate points from imported DXF file to heights in LAS databse

Is it possible to elevate points that are on the same plane in dxf to heights that are in LAS? I have imported dxf and las file in Arcmap but I need guidance or at least direction where to start ...
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3 votes
2 answers
5k views

Slope tool gives wrong degree values

I am trying to create a slope map in ArcMap out of a DEM. I used the Slope Tool (Spatial Analyst), selected my DEM as input and degrees as an output result. There I got the message that "The Z units ...
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2 votes
1 answer
312 views

arcpy and ArcGIS Pro: update Z values of a pointMZ geometry

I am trying to "reverse" the values of Z in a pointMZ geometry with arcpy.da.UpdateCursor. Anyway, I am not able to find a way to achieve this, although my script seems to work (no errors, printing ...
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