Questions tagged [point]

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

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13 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
31 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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18 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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26 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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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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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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35 views

Determining which interpolation method suits a bathymetry (river) with gridded 0,25x0,25m with no extreme terrain difference in Z [closed]

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 height. I used nearest ...
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17 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 ...
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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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46 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. I am trying to add points on the path for every hour. Since storms are nonlinear ...
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2answers
54 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 ...
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1answer
45 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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19 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 ...
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1answer
107 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 ...
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1answer
53 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 ...
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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
31 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 ...
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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 ...
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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
33 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 ...
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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 ...
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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 ...
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1answer
48 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 ...
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1answer
65 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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48 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 ...
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20 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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52 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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32 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 ...
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2answers
62 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 ...
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1answer
55 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) ...
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1answer
29 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 ...
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1answer
55 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 ...
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1answer
32 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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35 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 ...
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2answers
38 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 ...
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15 views

How do I separate .lasd into point files of each class?

I am wanting 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-...
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18 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 ...
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1answer
41 views

Create point clusters based on grid

I am trying to make a systematic cluster sampling pattern for data collection. The sampling consist of the points placed over the landscape in 6 km span (red). From this major point, I need to create ...
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2answers
41 views

Random sampling in ArcGIS Desktop

I have 14,033 points representing the location of some weather stations across the 36 states in Nigeria. I want to use an ArcGIS Desktop sampling tool to implement a random selection of 200 points ...
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29 views

Get position/rotation of free labels in QGIS

I want to export the position and rotation of labels with placement "Free" as I need them in Mapbox, which has inferior label placement compared to QGIS. I've tried with various polygon-to-point ...
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42 views

Counting points in polygon containing holes using QGIS?

Basically, I have these area (part of a bigger map) containing many holes (e.g. lakes) I have thrown on the map some 1000 random points and I want now to count those that fall in that area. I already ...
2
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1answer
54 views

Getting nearest point but with a filter conditional in QGIS 3.4?

I have two point layers in CSV files, each with about 500 points/rows. Each point in both layers has a year column (attribute). I know how to use Distance Matrix to find the nearest point. BUT: For ...
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0answers
55 views

Creating DEM from points in QGIS? [closed]

I'm trying to make DEM from points in QGIS. I've read all the other questions regarding the same issue and tried them all. But, none of them worked. For example, at the end of inverse distance ...
1
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1answer
49 views

Counting unique species in polygon layer and buffer

Within QGIS I'm working on a data set that contains species at 100m resolution (eg OSGB 6 fig) and 10m or finer resolution (eg OSGB 8 or 10fig). The objective is to count the number of unique species ...
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23 views

combine layers in qgis

I have a Shapefile that includes country divisions (Polygon). I have another Shapfile that relates to the country's roadmap (Path). I also have another Shapfile that relates to the village points (...
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8 views

Matlab's geographicToDiscrete function does not return the correct col, row

I have a shapefile with points (in WGS84) that overlap with a raster layer (also in WGS84) and for each point I want to calculate the corresponding col and row raster coordinates. I work on Matlab ...
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1answer
46 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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30 views

Point and Polygon Intersection [closed]

I have a .csv with a column for ID, latitude, and longitude, which creates points. I also have a .shp file which creates polygons of a parcel. I want to be able to attribute the polygon to the point. ...
3
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3answers
238 views

Insert n points equally distributed into many polygons

I know the "Random Points inside Polygons" tool in QGIS. It generates the below output. What I want to achieve however are 8 equally distributed points for each of the polygons. I thought of dividing ...
3
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3answers
154 views

Updating multiple vector points at once with vertex editor in QGIS?

I have a series of points in .shp format arranged in lines over an area, which I've used the 'regular points' tool to generate. In some of the lines, I want to decrease the spacing of the points so ...