Questions tagged [point]
A geometric element defined by a pair of x,y coordinates.
1,759
questions
0
votes
0answers
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 ...
0
votes
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, ...
3
votes
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 ...
1
vote
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 ...
1
vote
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 ...
2
votes
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 ...
1
vote
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 ...
0
votes
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 ...
0
votes
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 ...
0
votes
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.
22
votes
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 ...
35
votes
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:
2
votes
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 ...
2
votes
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 ...
0
votes
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?
1
vote
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, ...
0
votes
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 ...
2
votes
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 ...
1
vote
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?
...
1
vote
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 ...
1
vote
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
vote
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 ...
0
votes
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
5
votes
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
votes
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 ...
0
votes
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 ...
1
vote
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 ...
1
vote
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 ...
0
votes
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 ...
24
votes
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 ...
2
votes
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 ...
0
votes
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 ...
0
votes
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 ...
1
vote
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
votes
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 ...
1
vote
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
votes
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 ...
2
votes
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 ...
1
vote
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 ...
1
vote
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 ...
1
vote
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
votes
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
votes
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 ...
1
vote
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
votes
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
votes
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
votes
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
votes
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 ...
1
vote
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"...
0
votes
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 ...
