Questions tagged [point]

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

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2answers
30 views

Get median distance from a bunch of points from a assigned location and draw buffer accordingly

I have 2 point layers, say layer A and Layer B Layer A with a bunch of points, Layer B with a single point. I first need to measure all the distances between every single point in layer A and the ...
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1answer
30 views

Counting points between two intersections: Roadway Network

I have a roadway network as a line feature and crashes as point features. I need to count the number of points that lie between two intersections of roadways. The biggest problem is the road is also ...
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0answers
26 views

Calculate decimal degrees from point data in ArcGIS Pro [closed]

I have point data. What I need is extremely simple. I need to calculate decimal degrees for each point (xy) but when I calculate geometry as lat/long it is in a weird format. When I calculate it using ...
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0answers
23 views

When creating a Nearest Neighbour from xyz, the raster cells are not centered with the original point cloud (QGIS)

I have a gridded point cloud 0,25x025. I ran a Nearest Neighbour with the same resultion (cell 0,25). The points of the cloud and the raster are not centered as seen in the picutre. Am I doing ...
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1answer
26 views

Find minimum number of polygons connecting two points

Given GIS data of polygons and two points, is there a way to find the minimum number of polygons you need to traverse to walk between the two points? Even an approximate approach would be fine for my ...
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1answer
30 views

How to add points using coordinates to QGIS without having to create a CSV? [duplicate]

Is there a way that I can add single points to QGIS (v3.4) by inputting coordinates directly into QGIS, rather than creating a CSV and adding them that way? I know there used to be a plugin that ...
3
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1answer
60 views

How do I construct a line from points that are out of order?

I'm using ArcGIS Pro and would prefer solutions using ArcPy, ArcMap, or ArcGIS Pro, but an open source alternative may work too. I'm trying to construct a line from a series of points using the ...
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0answers
37 views

One polygon layer for an area with different projects in the same layer?

I was wondering if it is possible (maybe not ?) to make a structure so that I can have diffrient information (projekts) over the same area/point in the same layer. This would be for an overview of the ...
2
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1answer
25 views

Choosing point from polygon (featurecollection) in Google Earth Engine

I want to get points from the polygon. If I just use function (randomPoints), each polygon does not have the same numbers (50) of points so I want to find the point from each polygon, but my code is ...
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1answer
30 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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0answers
33 views

Measuring spatial autocorrelation between binary point data from a non-random process?

I have a large (n=20,000) household point dataset with binary variables (compliance yes/no with mandated construction standards). I want to measure the degree of local spatial autocorrelation for each ...
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1answer
62 views

Line of Sight between sets of two points each

So I have a list of points with their longitude and latitude (Lon_A, Lat_A and Lon_B, Lat_B). I also have a DEM layer from the SRTM for the relevant location. I need to check if line of sight exists ...
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1answer
31 views

Making a spatial link to points within polygons in the field calculator in QGIS

I have a polygon shapefile of the counties in the UK and a separate point shapefile of project sites. Within the project sites attribute table I would like to add a new virtual column with the name ...
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0answers
16 views

Timestamping photos taken through Collector App

I am collecting catch basin point data from the field through ArcGIS Collector App. However, I need to take a picture with the date and time on it. Yes, I can use the third-party app like "Timestamp ...
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2answers
34 views

Split By Attribute for point feature gives error, 'unicode' object has no attribute 'polygon' in ArcMap 10.7

I have a point feature where many points share the same value as other points on an attribute called "site". I'd like to group them by that attribute, and then make the groups into a seperate feature ...
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0answers
28 views

Point style with Python MapScript does not work

Software details: CentOS 7, Python 3.6, MapServer v 7.2.1 is compiled from source. I use Python MapScript to build WMS, it works well for styling Lines and Polygons, but not for Points. For example,...
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0answers
34 views

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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0answers
11 views

Calculate centroid of points (group point) [duplicate]

I am new to PostGIS and I need to calculate the centroid of a group of points that have a cluster identifier (id_cluster). I need to get the latitude and longitude of the cluster centroid.
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0answers
11 views

How do I determent which interpolation method that suits a bathymetry (river) with gridded 0,25x0,25m with no extrem terrain difference in Z [duplicate]

Newbie here. The important thing is that the Z value doesn't go below the value of the xyz point cloud. It wouldn't be good if a ex a rock was half a meter below compare too the real hight. I used ...
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0answers
19 views

Bread crumbs for AVL ( Automatic vehicle location) Map

Working in ArcPro (New to it) and bringing in point data from our AVL software to a feature layer. I am trying to figure out a good way to create a breadcrumb track as well as last point for each ...
2
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1answer
27 views

Point to every other point as dataframe in R

I understand there are several tools out there that can help me accomplish my goal, but I think I'm running into more of a conceptual roadblock. I've tried to implement a fully reproducible example in ...
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0answers
64 views

Linear extrapolation of points using QGIS

I am currently working with hurricane data from NOAA’s IBTrACS. Each gathered data point is separated by three hours. The points and lines can be found in two different data sets on the IBTrACS ...
3
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2answers
55 views

Find 3 closest points in relation to another point

Using QGIS, I have two shapefiles: points representing enterprises (about 50k) points representing towers (about 300) For each enterprise, I need to figure out the three closest towers and their ...
3
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1answer
61 views

Assigning raster values to LiDAR point cloud in R?

I am trying to extract several point values for a set of liDAR data. I am starting with the DEM before I jump into the other more complicated values in my raster stack. Here is my code: library (...
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0answers
26 views

Draw (extend) a straight line from points

Is there any existent tool or workflow to generate a straight line in ArcMap? I have a lot of point that represent plant counting (one point per plant) and I need to generate e line that represents ...
5
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1answer
116 views

Converting large amount of points to polygons with QGIS

I have a large point dataset of about 4 million points in QGIS. I would like to convert these to polygons by connecting the outer edges and hence create ribbon-like X shapes (see image below). I ...
3
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1answer
56 views

Subset point vector based on attribute classification in underlying raster

I have two datasets: A raster file containing per-pixel vegetation classifications across Australia. The file is described to have projection of EPSG:3577 https://epsg.io/3577. All additional meta ...
2
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1answer
22 views

Combining Rotation and Graduated Colors in ArcMap

Is there a way to rotate the symbols of a point feature layer (with a given rotation out of the attribute table) that is displayed as graduated color layer? I can see the option in the graduated ...
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1answer
40 views

QGIS is not showing/rendering points that are present in MySQL server

I have a MySQL database in which there are auto generated points almost 1000 created via Laravel (PHP framework) it has a very simple schema as shown below. I just want to visualise them on an ...
1
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1answer
29 views

Coordinate Point Drops on timeseries in QGIS [closed]

I have timestamp data for every minute of a day (1140)for multiple objects by id, with a corresponding lat long. I want to get the time in which an id disappears off the map or off the csv. What would ...
2
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0answers
32 views

Variable buffer maximizing mean raster

I was wondering if it exists a way to create variable buffers where the radius is given by a process of maximization of the mean value of a raster. I have a point vector data and I would like to ...
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2answers
35 views

Deleting point data from ArcGIS Online

I am creating point data for Drainage using ArcGIS online. But I accidentally created a few points that I do not require. Is there any way that I can delete the record from the attribute table in ...
1
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2answers
35 views

Selecting from Point column in PostgreSQL?

How to select from Point column data type(native) in PostgreSQL? select a.* from indsolv.address As a where a.location = '93.2321, 21.0321' Getting error for the above query! ERROR: operator does ...
2
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0answers
39 views

Plotting point data from one dataset on polygon

I have a point dataset with information on: date, number of beneficiaries, and type of assistance. I want to plot/map this info on a country polygon. I tried joining attributes by location, but that ...
0
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1answer
56 views

QGIS - Duplicate Labels

I have a dataset of points with data at different depths: e.g as a csv file as follows: "ID","DEPTH","VALUE" "BH01","0.5","10" "BH01","2.0","50" There will be multiple points with the ...
2
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1answer
73 views

Moving point A to point B with attributes using QGIS

I have an A layer containing points with a XX attribute. I would like to move (on points A) the points of a layer B with the same XX attribute as A. There is no notion of distances (from a few cm to ...
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0answers
49 views

Comparing Random Point generators of ArcMap and QGIS

I have just compared the random point generator functions of QGIS and ArcGIS and had confusing results. My setup was: Create random points within an existing extent with a minimum dist between points ...
2
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0answers
22 views

Snap points to nearest line - however limit snapping to polygon the point sits within

I am trying to snap a series of points relative to the nearest line (which i know can be achieved via "Snap geometries to layer", however, i want to restrict snapping to the polygons the points sit ...
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0answers
53 views

Importing cvs file with coordinates into QGIS [duplicate]

I got a problem. I got some coordinates in Excel. They are written with comma 14459091,1010 ex. When I try to import them as csv-file into QGIS, it will only create a table and no points. When I look ...
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0answers
37 views

Showing Arrow connection relation between Polygon centroids to points in ArcGIS Desktop

I am looking for a similar solution to Making arrow from polygon centroid to point using QGIS but using ArcGIS Desktop. I have a polygon and a point shapefile. The polygon area drains to the point ...
2
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2answers
63 views

Connecting dots with lines, thickness depended on attribute value

I am having a point data of in total of 13 destinations within a region. The goal is to present how many people who were in destination "A" also visited the other 12 destinations. I have this data ...
3
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1answer
57 views

Distance between points along line

How do I determine the distance between points to the neighbor point that connected via the line(road)? In QGIS 3.8.3 I have tried v.distance and v.net.distance but they do not help. The line(roads) ...
0
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1answer
34 views

Displaying point data that is close together using ArcGIS Pro [closed]

I am using ArcGIS Pro to display point data on a map. Each of these points need to be displayed with clearly visible symbols. However, some of them sit very close together, and when displaying on a ...
1
vote
1answer
56 views

How do I find the area of a polygon covered by points of a defined size? (QGIS 2.18)

I'm using point vectors to portray 264 marked trees in a stand using the 'Random points inside polygons' tool (it doesn't matter where they are). Each point is 4.5m across (the average single tree ...
2
votes
1answer
38 views

Selecting random points from specific attribute in yield map using QGIS

I am using QGIS. A farmer has sent me the shapefiles from his John Deere combine. They were three shapefiles that I have merged into one layer. The shapefile is from one field with a treated ...
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0answers
39 views

Separating 50 duplicate points by limit in buffer zone using QGIS

I am building a customer database in QGIS. I get GPS coordinates for customers from my staff. Then I convert those GPS coordinates into shapefile points in QGIS. I get a lot of duplicate points. I am ...
2
votes
2answers
42 views

Routing a consecutive set of points on a network

I need to generate routes based on a consecutive set of points exactly as given in this routing script by Anita Graser. As given in this image, I have a layer of consecutive points as well as a ...
1
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1answer
28 views

Separating LAS Dataset (.lasd) into point files of each class?

I am want to examine my DEM, DSM, and other models I'm generating from LiDAR data in the model wizard to find the method with the least amount of error. I want to separate the ground, and non-ground ...
4
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1answer
68 views

Isolating utility pole points from small scale LiDAR scene?

I am working with some LiDAR data, and have a problem I just can’t seem to solve myself... The image below shows a point cloud representation of a utility pole. In this point cloud, there is the pole ...
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0answers
22 views

QGIS point displacement with features that each have 2 variables

My goal is to use point disclacement to have a view like this without overlapping symbols: However, the result with using point displacement this (QGIS displays only the first attribute): If I ...