Questions tagged [point]

A geometric element defined by a pair of x,y coordinates.

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15 views

Random coordinates need to move little right

I have amcharts map which shows circle on it. I have few records(nearly 200) which do not have locations. These records(circle) I am showing in the map in Sea so that those records clearly will be ...
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0answers
99 views

Save symbology when exporting a POINT layer from QGIS to MapInfo .tab

I use the same TrueType Font .ttf as in MapInfo for symbology of a POINT layer in QGIS 3.12.1 And I tried to export this point layer to .TAB format with symbology, but when I opened it in MapInfo, ...
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2answers
65 views

Calculating distance between points only within same polygon in QGIS?

I am using QGIS 3.10 and have shapefile that contains multiple polygons (1615 polygons to be precise). In order to claculate the "compactness" of the shape of each polygon I want to ...
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1answer
40 views

How to calculate the azimuth of an offset point/line?

After receiving and answer to this question, I am stuck with another problem. For context, my end goal is to assess windward/lee side of a forested edges (line segments) in respect to a dominant wind ...
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0answers
34 views

Offsetting multiple points

I have a multiline shapefile and a point shapefile. The points are supposed to fall in the center of line breaks but when imported to qgis, the points fall on one end of a line break. Is there a ...
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1answer
13 views

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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1answer
293 views

Using Click locations to determine azimuth in QGIS 3

I am using QGIS 3 64bit. While adding points to a shapefile (layer), what expression captures the insertion point coordinates of a point feature to use as a start point for an azimuth determination ...
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1answer
32 views

Finding best path through set of many points using ArcGIS Pro

Assume I have many points, say 100 or more, that represent a station to visit. I want to choose one of them as a starting point, and then navigate to each and every one thereafter to take a sample of ...
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2answers
369 views

Unable to save point features to QGIS on MySQL database

I created a table with point geometry in MySQL. Subsequently added a vector layer from MySQL table. The table could be accessed from QGIS. However on pressing the add button the system threw warning ...
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0answers
17 views

Linking up lines to points within polygon using ArcGIS Pro [closed]

I want to create a line that follows each point in a room. My file is in GDB because I'm using a tool to generate the centerline. I do not have a license to use the official Esri tool.
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7answers
50k views

Drawing Circles with set radius using QGIS

I have a site and want to draw an indicative line in a 5km buffer around the centre of the site. So I want to draw a circle with a radius of 5km. I have a tool for drawing circles and ellipses and ...
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10answers
10k views

Creating regular point grid inside polygon in PostGIS

How to create, inside a polygon, a regular grid of point spaced x,y in PostGIS? Like the example:
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0answers
34 views

Finding boundary between two different groups of points

I have a dataset with premises and their location in lat/lon points. Not all the premises are the same. Some premises are offices and other premises are houses. I am trying to find the best way to ...
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1answer
36 views

Understanding “create-grid” output and getting grid points' coordinates

I created the following grid points by using the "create grid" pluggin from the processing toolbox, then "Intersection" to clip from a mask. My idea was to calculate the ...
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0answers
20 views

Showing number of points at very close distance in large map [closed]

I tried to show some points in a map but they were not evident enough. Want to make a map in ArcMap that may look like this- How can I show points in a map like this image?
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0answers
38 views

Concave Hull with points that have to always intersect

I use Concave Hull(Alpha shapes) tool in my set of points in QGIS, it works fine, but I want add some extra points in the beginning, which line of Concave Hull always intersect them. In this image, ...
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1answer
424 views

geoplot: axis limits cannot be nan or inf

I am trying to plot a geodataframe with geoplot, and cannot work out the solution to ValueError: Axis limits cannot be NAN or Inf Context: Linux (Ubuntu 19.10, x86_64) cugdf.head(): Cu_ppm ...
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2answers
1k views

Extending line by adding point at end of it using QGIS?

I'm using QGIS 2.8 to modify a line. I need to add a point on one end of this line, and then move this new point further away, leaving the original end point in the same place. I can manage to create ...
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1answer
69 views

Calculating number of polygons needing to be crossed?

I have a bunch of polygons (parcels, green areas) and a bunch of wells (point, black triangles). How do I calculate the number of parcels I need to cross to get to the closest well to each parcel? ...
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1answer
70 views

Export/convert Points to Polygon

I have to convert a .shp into a .csv file and upload it to the SQL Server, for a program that only supports Polygon format and can not render Points. Is there a way to convert Points to Polygon or is ...
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2answers
33 views

Detecting if a point is inside a polygon with Python 3 and OGR

I am working in Python 3.7 using ogr to check if a point is inside a polygon. Here I put the code. The result in geom is not compatible with the tuple list data type used by the point_inside function. ...
1
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1answer
512 views

Using spatial points to extract values from large raster in R

I am working with location data for 22 different individuals (id). The data contains an id column, and coordinates (UTM_x and UTM_y). For all individuals combined, there is a total of 991,099 ...
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1answer
33 views

Display points from CSV table (feature collection) in Google Earth Engine

Unfortunately, I cannot display the point data I uploaded as csv file. I specified latitude and longitude, the rest is unknown so I kept it at default. Can somebody help? Link to asset
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2answers
735 views

Prevent the Feature Attributes dialog box in QGIS

Any time I am inserting new point feature in QGIS, the Feature Attribute dialog box is popping up. Is there a way to prevent it? (I am willing to insert many points at once and this pop up box slows ...
2
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2answers
206 views

Method to convert all 'overlapping' points to exact same geometry in QGIS 3.4

I have a point vector layer with approximately 2.5 million points, many of which share the same or a very similar geometry (within 1 m of each other). I would like to know if I can bulk amend the ...
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3answers
105 views

Finding median value of many points within polygon using ArcMap

I am using ArcMap version 10.7. I have 2 layers, one point and one polygon (council district boundaries). The polygon layer has several polygons in it and each point has a dollar amount associated ...
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1answer
27 views

Subtracting point values from raster maps in QGIS

I have point values (x,y,z) and a raster map with z-values. I would like to subtract the z-values of the raster map from the z-values of the points. The resulting data has to be point data (x of point ...
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1answer
46 views

Creating tracks for moving points (while discarding records without movement)

I have a csv with columns: id latitude longitude timestamp Many of the points (or "id"s) do not change "latitude"/"longitude" over time, others do. How do I filter out ...
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1answer
200 views

Removing duplicate points in GeoPandas using distance and time

I have a list of of coordinates that have areas mapped out on a map user_id id latitude longitude requested_at 84 106 13.0472367 77.5022635 12-10-2020 14:59 84 107 13.0472789 77.5024498 ...
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9answers
51k views

Calculating latitude and longitude of points using QGIS

I'm trying to figure out how to calculate the lat/long of points using the QGIS Field Calculator. Is there an easy way to do this? I saw a previous related question (Using QGIS API and Python, to ...
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3answers
68 views

How to connect points to lines in order using QGIS?

I have a set of points and I want to create lines from them. Points belonging to one line have unique UniqueID to be grouped by. I try to use QGIS' Points to path algorithm. What I don't have is an ...
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0answers
61 views

ERROR 010555: Internal error in Sample: %s. Failed to execute (ExtractMultiValuesToPoints)

I'm trying to run the following code to extract different types of climate data for various points: # Import system modules import arcpy from arcpy import env from arcpy.sa import * # Set environment ...
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1answer
71 views

Applying symbology based on algorithm using ArcPy with ArcGIS Pro

I have 100 points and I want to apply a color palette to the points so that no two points within 25 miles have the same color. The issue I'm trying to prevent is having points close to each other ...
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0answers
23 views

Visualizing overlay of 6 point data sets using ArcMap

I have a visualization question. Using ArcMap 10.6, I would like to overlay six point datasets in a way that synergies and differences can be quickly seen by people who have no idea about GIS ...
2
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1answer
112 views

Processing dbscan by group

I am new to PostGIS and I need to do DBSCAN by commune. I have the base dir_v2: id_dir geom commune I need to process clustering at least 1000 points in a radius of 1000 meters per commune but it ...
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1answer
35 views

How to create polygon automatically with coordinates [duplicate]

I have some bunch of points in an area and I want to draw connecting lines with the help of points to create a closed polygon. But all these needs manual efforts. Can any one explain to me how to ...
6
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2answers
272 views

Snap points to the nearest location on a polygon

I have some PostGIS SQL that generates uniformly distributed point cluster centroids within polygons (loosely based on this tutorial). The number of point cluster centroids generated is based on the ...
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2answers
36 views

Populate Elevation Data in GPX using FME

New to FME, and I have now spent more time than I would like to admit on this and need some pointers. I have a GPX file that was made from a Shapefile. It has no elevation data. I have the Terrain50 ...
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2answers
29 views

Exporting X,Y coordinates relative to reference point with QGIS

I have a number of points (grey points in attached picture) around a reference point (red point in picture). I need to export X,Y data corresponding to the horizontal and vertical distance in meters ...
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0answers
21 views

How to quantify the similarity of spatial patterns?

I am not a GISer, but I do believe a GIS (more specifically, spatial statistics) algorithm could help with the task I am carrying on. If posting a question that has already been posted (by me) on ...
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1answer
363 views

Count number of points on a line in R

I have a SpatialLinesDataFrame and a SpatialPointsDataFrame. I want to calculate the number of points that fall on a line by a specific field in the lines data frame. Example: I have a river network ...
3
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1answer
129 views

Buffer around Point is elliptical, not circular

I'm trying to create a circle around a point using the code from this answer here. Adding below for better visibility as well from functools import partial import pyproj from shapely.ops import ...
5
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3answers
146 views

Calculating distance of all points to central point using QGIS

I'm using QGIS and the points on this map represent different periods of the day in which coyotes were observed. I am trying to figure out if coyotes are active at different times of the day based on ...
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0answers
21 views

Filtering duplicate records using space and time overlap

I have a dataset consisting of about 23,000 fire incidents obtained from years of fire brigade reports. The incidents have a lat, lon, and timestamp. The problem is that in the case when two (or more) ...
2
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1answer
69 views

Calculate 500m south of coordinate in PostGIS

I have a point layer punkte_test. From that I want to make a line: first point of the line is the point A from the point layer itself. Second point of the line shall be y(B) = y(A) - 500 m . How can I ...
3
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1answer
92 views

Mapping polygons into lines and projecting lines on road network

I have a layer with polygons that describe road damages. I have then another layer with road network lines. The layers are shown in the picture. I need to project the polygons as lines to the road ...
3
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1answer
218 views

Calculating minimal distance between point and polygons for multiple categories in QGIS

I have set up about 45 camera traps for monitoring hares. The GPS-positions of those are shown in a point layer in QGIS. Based on satellite images, I digitized a map of the research area, with all the ...
9
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1answer
99 views

Categorising point layer twice by size and form in QGIS

I have data points from a CSV-file that I opened in QGIS. The points illustrate different power plants of solar, wind, geothermal, coal, oil, etc with different capacities within each class. I already ...
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1answer
60 views

How to overlap two layers of points with different size

I am new in QGIS. Here is my problem : I have two layers of points. In these two layers, my points have different degrees or size : For the layer 1, the point "a" has a size of 3, and the point "b"...
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0answers
30 views

Plotting xy data in ArcMap

I have a .csv containing the name, longitude, and latitude in the first, second and third column, respectively. Longitude and latitude are in decimal degrees in WGS 84. However, if I try to plot these ...

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