Questions tagged [z-value]
It is the vertical position of a 3D coordinate.
68
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3
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Deleting duplicate points by attribute in shapefile using QGIS
I've got a point shapefile which has a single attribute (elevation Z) and there are a lot of duplicate points (several points in the same location but each one has a different Z value). I would like ...
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SQL Error [22023]: ERROR: Geometry has Z dimension but column does not when updating SRID of PolygonZ column in PostGIS
I am trying to update the SRID of a PolygonZ column using:
select UpdateGeometrySRID('public', 'bfp_clusters', 'convex_hull', 4326) ;
I get the following error:
SQL Error [22023]: ERROR: Geometry has ...
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0
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Append FeatureClass without losing z-values
I need to copy polygons (including z-value) of a feature class (in one fGDB) to a new feature class (in another fGDB) with a different data model. For this I use the DataManagement tool "Append&...
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Problems with the Z-values / exporting MXD (ArcMap) to DXF (AutoCAD)
Circular arcs are polygonalized in the DXF output. Several support points are inserted into an arc, which are connected to each other with polylines. The Z-values of the inserted support points are ...
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3
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1
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284
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Buffering with consideration of both distance and height using QGIS
I have a shapefile with points including their altitude (Z) and a DEM raster.
Basically, what I want is to create various buffers around the points extending up to 50 meters from them, but at the same ...
2
votes
1
answer
633
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Create cross section from 3D Polyline in QGIS
I have a 3d poly line and I want to create a cross section profile using this 3d lines.
What I want to achieve:
I) Create vertices in the 'cross section line' where it intersects with the 3d poly line
...
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1
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1
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189
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MultiLineStringZ in QGIS 3D view
I have a point layer with Z values that I display in the 3D view of QGIS. I want to display the trajectory of those points as a line layer, like in Google Earth. Therefore I converted my PointZ layer ...
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386
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Adding z dimensions to a Polygon
I have a polygon (vector file) which has a base z location from a raster file, however it is still a flat shape.
Is there a way I could add a z dimension to this vector file so it covers a 3-...
2
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1
answer
100
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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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171
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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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1
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181
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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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0
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366
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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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0
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254
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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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185
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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
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1
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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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0
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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 ...
4
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1
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162
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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
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74
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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
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262
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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
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680
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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
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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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0
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75
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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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79
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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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1
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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
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484
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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
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2
answers
3k
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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
337
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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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0
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71
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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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0
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144
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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 ...
5
votes
1
answer
624
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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
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296
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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
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36
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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
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1
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830
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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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106
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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
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265
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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
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765
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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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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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0
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101
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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
303
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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
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840
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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
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63
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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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1
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574
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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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votes
1
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731
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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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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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2
votes
2
answers
2k
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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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956
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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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0
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177
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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
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1
answer
2k
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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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1
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193
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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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