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Questions tagged [z-value]

It is the vertical position of a 3D coordinate.

6
votes
1answer
96 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 ...
0
votes
0answers
22 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 ...
1
vote
2answers
39 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 ...
1
vote
1answer
30 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.)....
5
votes
1answer
195 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....
1
vote
0answers
74 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 ...
2
votes
1answer
68 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. ...
1
vote
1answer
135 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 ...
-1
votes
1answer
27 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.
1
vote
1answer
181 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 ...
2
votes
1answer
249 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 ...
3
votes
1answer
1k 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 ...
2
votes
2answers
800 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 ...
0
votes
1answer
268 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 ...
1
vote
0answers
128 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 ...
3
votes
1answer
770 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 ...
1
vote
1answer
95 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 ...
3
votes
1answer
1k 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 ...
1
vote
0answers
34 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?
2
votes
2answers
94 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 ...
3
votes
2answers
3k 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 ...
1
vote
1answer
279 views

Can Geoserver have z?

Is there a concept of a Z value or "altitude" associated with each point of a polygon that can be exposed with WFS in GeoServer?
1
vote
0answers
87 views

Keeping the z-statistic while kriging within ArcGIS Model Builder

I am creating a model that accepts in a .csv file and plots the XY points on a calculated field. The preferred interpolation method is kriging, and when I try to update the z-value field, the ...
0
votes
1answer
209 views

pgRouting not returning node with correct z-value

have an issue with pgRouting that I've modified to consider multi-floor indoor areas. I've created a mock floor plan of any typical hotel. I copied the floor plan and assigned a different z-value to ...
2
votes
0answers
327 views

Digitizing complex archaeological scenarios in various levels?

I don't know if this issue has already been answered, but I can't get my head around it. I used to do this in Illustrator, and there it was simply a matter of clicking "bring forward/bring back" etc. ...
3
votes
0answers
300 views

Run kriging in ModelBuilder with various shapefiles

I need to run kriging in a model, using 5 different point shapefiles. I put as input %Name% to run the different shapefiles, but in Z value field I have an error, because it's different in each ...
2
votes
1answer
733 views

Automatically adding Z-values from a DEM to an already created polygon

We have excavated a very large 5.000 year old fish fence, which was documented by photogrammetry, and is now being digitized. I started digitizing the orthophoto in QGIS and everything is cool. Now I'...
0
votes
1answer
624 views

Exporting linework layer with 'altitude' attribute in QGIS to DXF with lines raised in z according to altitude attribute?

I have contours which I have brought into QGIS from a GEOjson - the lines have an attribute of 'altitude'. I want to export these contour lines as a DXF with the lines raised in the zplane according ...
1
vote
1answer
3k views

Z-value missing in attribute table of shapefile from ASCII 3D to Feature Class?

i'm trying to convert some *.xyz files into shapefiles but unfortunately it does't work out correctly! I use the tool "ASCII 3D to Feature Class" (ArcMap extension "3D Analyst") because I've read this ...
3
votes
1answer
675 views

Shifting an entire .las file in Z?

I have a set of .las tiles. I needed to edit one of the tiles in Trimble's Inpho DTMaster to remove some noise. The coordinates are correct in the program, showing a my desired elevation. On export, ...
0
votes
1answer
2k views

Manually add a Z variable in Qgis onto a vector layer?

I am trying to manually add one constant Z-variable (e.g. 200meters) across an entire Vector Layer in Qgis so that I may eventually use the Interpolation plugin to generate a Tin. I have not been ...
0
votes
2answers
1k views

How to create shapefiles with z coordinate with QGIS

I'm working with QGIS, and I want to create a shapefile with the elevation coordinate, I can't find something similar to what I was used to do in ArcGIS, can you help me?
3
votes
2answers
3k views

Assign Z-values of river stream segments

I have used Interpolate shape tool in 3D Analyst (ArcGIS 9.2) in order to obtain Z-values of each segment along the stream lines. As input features I use Riverstream.shp file and as raster surface ...