Questions tagged [point]
A geometric element defined by a pair of x,y coordinates.
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questions with no upvoted or accepted answers
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Clustering without aggregation with QGIS Point Displacement
I've seen the following map on twitter and am looking to create the same effect for point displacement.
I'm familiar with grid and circle point displacement as well as with clusters point to aggregate ...
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Finding distance from points to the boundary of the nearest polygon in Python
I asked this question on stackoverflow.com but it seems that doing so here is a better option.
Context: I want to compute the distance from points to the closest boundary of the closest polygon to ...
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Automating lines between existing points within polygons
I have a task that I do on a regular basis and was looking for a bit of assisting learning the best way to tackle automation on this.
Brief
Each blue point has to be connected to the orange point ...
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Select subset that is spatially equally distributed
Let's say I have a table point with ~10.000 rows. Each row contains a POINT(x, y).
I also have a table polygon with POLYGONS(...).
The points in the point table are unequally distributed in space. ...
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Query a different density of points based on zoom level in PostGIS
I have a database (using PostGIS) of a few million points that I load onto an interactive map. Obviously the map can't handle this many points, so I currently restrict it by limiting to the points ...
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Making weight heatmap on recurring event in points layer using QGIS
I have a heatmap created on a points layer of deer-vehicle collision. Now, I want to weight the heatmap on the recurring of crash in the same area in different years.
I would give weight 0 if a point ...
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Create equidistant points along line network?
I am trying to create points at every X meters along a set of lines that represent a network. As suggested in QChainage doesn't place points evenly along dissolved lines I managed to this ...
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How to move a point on a touch screen using esri map, dojo and javascript
I am new to map development. For touch screen devices, I need to add a point on an ESRI map and then move this point to other location on the map and get its coordinates.
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Get Distance between two point on linestring using mysql Spatial
I have a linestring and two point on this linestrin according to my picture
i want distance between two point as base of linestring please hellp me
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Action: Move pointfeature to other layer - Point becomes Multipoint
I'm trying to write an action that moves a pointfeature from one layer to another.
It works fine until i try to save the layer with the new feature on. He says he can't save a MULTIPOINT to a point-...
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Calculate the travel time from locations to the closest N points
I want to calculate the travel time (based on walking time) from locations to the closest N points of another dataset. Then I want to create a hull around those N closest points per location
Is this ...
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FME GeometryReplacer, WKT Error
I am trying to load POINT WKT Geometry from MS SQL Server, it is in WKT Format. Using the GeometryReplacer, I am receiving an Error, and everything looks right as far as I can see, it continues to ...
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Evenly distribute some points in different polygons (blocks)
I need to evenly distribute some points in different polygons (blocks) that I have within a study area in QGIS. Does anyone know any tool or way to do it?
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Extract Max or Min Value from Point File Attribute and then Add XY Coordinate
I have created a Point dataset by using the Saga routine 'Convert Lines to Points'. This produces the following look and attribute table:
Can anyone advise on how I can extract the maximum value from ...
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Adding easting and northing points in ArcGIS
I am trying to add coordinates into ArcGIS 10.6.1. Below are the Northing and Easting I have been given.
I have added these Northing and Eastings into an Excel sheet and saved them as a CSV File (The ...
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Number of points in .las by PDAL from Python
I need to recieve the number of points that .las file has from Python and save it as variable. For now I'm doing it like this:
def execute(self, pipeline):
pipeline = pdal.Pipeline(json.dumps(...
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220
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Making bivariate symbol map in QGIS
I am making a bivariate symbol map in QGIS in which, the size of the symbol depends on one variable whereas the color on other. For example, I have taken India data from https://simplemaps.com/data/in-...
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309
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Finding the nearest distance between points in a grid cell
I'm trying to find the distance between the nearest points in a grid-cell, such that there is no equivalence relation between these points. Meaning if there are three points {a, b, c}, then a = b; not ...
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237
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No geometry when importing points from CSV
I'm having problem importing a point layer from Excel. I've saved the Excel file as a CSV and added it to QGIS (2.18) through 'Add delimited text layer' I've checked in semicolon and choosen the right ...
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2
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Creating path between many points in Google Earth
Is there any specific way to convert approximately 25000 points in Google Earth Pro to paths or draw paths between points automatically? Since I want to obtain their altitude data, I need it to be a ...
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Align arrow (point layer) to water direction (line feature)
Assuming that pipes are digitizet correctly (first node as upstream, last as downstream), I need to align the arrows of a point layer to display flowmeter's direction. So far I need to use v.split (...
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Extract values from rasterstack TIFF for point data locations in Python
I am working on machine learning algorithms for predicting wildfire sites on state level. I have a CSV of wildfire instances, that has 37 columns including a geometry column, a lat column and a lon ...
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348
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Creating route between specific nodes based on sequence in QGIS
Right now I am working on a project related with the german railway network. I have a layer call "Stops_1_2" which contains the trip id, the stop sequence and the name of the station. I have ...
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156
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Reducing points but maintaining attributes from original shapefile
I have a shapefile with points but there are a lot of points and I want to reduce the amount.
I have tried "Points thinning" which automatically reduces the amount of points but it loses all ...
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Point grid in QGIS
I'm working on a project that needs me to map out a point grid for drilling work.
The grid needs to fall within an already created polygon and be spaced 30x35meters. I was able to overlay a pointgrid ...
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Find distance between multiple discrete sets of points QGIS3.8
No similar question seems to relate to my issue but I desperately need help with calculating distances.
I have a CSV with the residential postcode of 200 000 patients. For each patient, I also have ...
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Drawing polyline with user input points in QGIS using Python
I have an empty layer in QGIS in that i just want to draw a polyline by selecting points on layer using Python.
For example, if I select a start point and endpoint on a layer, I want to draw a line ...
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182
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Grouping neighbor points based on field sum in QGIS
I have about 14,000 points. These points have a specific field "time", an integer value, mainly between 1, 2 or 3.
I would like to split these 14,000 points into groups based on the "time" field ...
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351
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Is there a "Disperse Markers" option in Mapbox GL-JS?
I have used the "Disperse Markers" tool in ArcGIS before, but I am currently working on a project where I am using Mapbox GL-JS to display point data. Many of my points overlap, and I would like them ...
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Label QGIS points layer with auto incrementing number count from 1
I have imported a CSV layer to my map and want to label the points with a numeric count from 1 upwards, counting just the visible points.
I have almost found a way to do this using the ...
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645
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Create a perpendicular line of points to another line
i have two problems over here. QGIS
1- I need to create a perpendicular line to connect multiple points to multiple lines but these lines have to follow a sequence of column.
2- And these ...
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235
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QGIS: Style Point displacement brings too much together
I want points which are close together, about 10 mm from each other on the printed map or 500m in real world to be arranged in a circle around their center point. In other words I use Point ...
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Modify features not updating on vector layer
I have point vector layer in my application.Now I am trying to modify its coordinates. I am able to do it but its not reflecting on layer.
Here is code I am using :
var selectInt = new ol.interaction....
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Algorithm to simplify a Polygon/Series of Points to a given number of Points
I have a polygon (or let's call it just a series of points). I want to simplify it (reduce the amount of points) to a given number of points.
Currently I use Douglas Peucker and try to guess the ...
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How to Interpolate very large datasets in QGIS?
I am working with a very large set of point data, (XYAttribute) which I wish to display as a raster.
I've been using Interpolate, this is successful but very slow.
I have other programmes that ...
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How to Batch Change X, Y Coordinate Number in ArcGIS?
I have a huge number of points (100000 points). Some of these have the same x,y coordinates. For example, 50 points are same in x,y then 100 points are same in another x,y coordinates and so on. ...
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Can't find point/polygon intersect using QGIS (Windows only)
Below I describe the method I am using.
I have two machines:
ubuntu linux, qgis 1.4 - intersection works
WIN xp, qgis 1.8 - intersection does not work
Hopefully, someone will find what I am doing ...
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1
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ArcGIS - Locate features along routes returning double results?
I am using locate features long routes using a points layer and a routed polyline network.
Each point has a unique ID. My end goal is to determine is a point is to the left or right of the line.
...
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31
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Add raster and vector layer values to millions of points (QGIS)
I need to create a CSV file with the values of 10 rasters (30m pixel resolution) and 5 polygon layers. Each row of the CSV should represent one pixel of the rasters and the columns should contain the ...
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Calculate a correction factor between two sets of data
I'm a data science student and have a problem with harvesting data.There are two sets of geographic data (stored as points) that stores the yield of a soybeans harvest in the same field, they are from ...
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47
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QGIS Atlas point for each column attribute
I want to automate the export of maps of a point layer automatically for each of the columns of the attribute table. It's possible?
SP_A1
_Defo_m
_Deco_m
_Int_t1
_Int_T2
_Int_T3
_Int_T4
_Int_T5
E....
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Create multiple callout lines from a single label
I would like to label groups of points (clusters) with only one label but several call-out lines. I built on top of the very appealing answer from @eurojam here: How do I give one label to two points?
...
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Heatmap changes to single color when zooming out in QGIS
Working with QGIS 3.28, I have a point layer with several million points. Using heatmap renderer, I get the left heatmap with these settings:
scale 1.100.000
radius 200 meters at scale
Maximum value: ...
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Statistical summary of points in a polygon (QGIS)
Is there any method for calculating the average, largest value, etc. (chosen statistic value) of points within polygons and giving the calculated value to the polygon?
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Generating Points Along Lines not starting at the start of my line feature
I am trying to generate chainage points in 50m intervals on a road system including the start and end of the line. Each road is its own single continuous line and while attempting to solve my issue, I ...
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79
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Combining polygons based on distance matrix in QGIS
I have the following layers in QGIS:
a polygon layer made up of all the zip-code areas in Germany
a layer displaying all the electricity grid nodes in the country.
In a previous step, I created a ...
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How to get equal size cells when using rasterize in QGIS on slanted points
I'm trying to get nice, centered cells on every point. I'm using the tool rasterize in QGIS. I have gotten the method to work with uniform point data, however, I am having more trouble with slanted ...
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Unable to load CSV as viewable features
Have tried loading a .CSV using Delimited Text tool. When it Loads up, it only loads as an attribute table with no spatial view.
What am I doing wrong?
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Shapefile Attribute table: Automatic numbering of points arranged in (non-orthogonal) row/line based blocks, by row order + from left to right
I have a Sentinel time series of several rasters, which contain reflection values for 10 Sentinel-bands. Now I'd like to excerpt these values for given points. The sample points are arranged in pixel ...
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Distance between points to points in QGIS
I have two points layer one has some 70,000 points (Layer A) and other has some 5000 points( Layer B). I want to calculate distance of Layer A points to Layer B Points. But unfortunately both don't ...
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