Questions tagged [point]

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

Filter by
Sorted by
Tagged with
5
votes
3answers
140 views

Shifting existing points (Shapefile) to the center of raster pixels

I have some points in a shapefile in order to sample reflection values out of raster files. As these points are not positioned exactly in the center of their respective pixels, I am looking for a tool ...
1
vote
0answers
13 views

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 ...
0
votes
0answers
13 views

Converting Lat Lon points to line, then calculating distance travelled in QGIS

I understand this question, or variations thereof, gets asked regularly but no matter what I try I can't seem to convert points from GPS tracks to lines, then calculate the distances travelled. This ...
0
votes
0answers
8 views

What causes the QField error message 'unable to save'?

I cannot seem to find any information about this particular error message. When trying to add a point feature in QGIS, I receive the message 'Unable to save' (see screenshot). I have tried to find ...
1
vote
0answers
14 views

Count number of occurences per location per hour in PostgreSQL [migrated]

I have a dataset in Postgres of boat locations on waterways. Here is a sample of the table: Boat_ID Timestamp Waterway_ID Boat_A 2019-01-01 16:29:11 WW_01 Boat_A 2019-01-01 17:03:04 WW_02 Boat_B ...
0
votes
0answers
26 views

Predicting points based on pre-existing point data in QGIS [closed]

Is there a method to use points from a .csv-file in QGIS for predicting future points in a given area? For example, say you have a collection of points (lat/long) that represent locations that an ...
2
votes
0answers
22 views

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 ...
1
vote
0answers
19 views

Automatically create points based on algorithm

I have a shapefile with points representing the sightings of different bird species on different dates (in ArcMap 10.4.1). I now have to create a new shapefile with points for bird territories. A ...
0
votes
1answer
41 views

Graphic Display of Trees with QGIS

QGIS Zürich 3.18 Win10 Using a point layer I can co-ord locate my trees. Graphically I want to display my points reflecting the Field trunk girth circumference and with a hard edged outer semi-...
3
votes
1answer
70 views

Removing labels from area that is also shown on inset map with QGIS

I am making a map of a continent on QGIS and I have marked some locations. Some of them are very close (making it difficult to read the labels) while some parts of the continent are empty. I have ...
4
votes
2answers
70 views

PostGIS ST_Contains / ST_Intersect with one point envelope

With PostGIS I have to test wether a point is inside an envelope or not. Sometimes the envelope is constructed from a point and a few others next to it, and sometimes only from a single point, against ...
0
votes
1answer
20 views

Extraction of single point layer out multiple points (having same lat lon) using Line feature in QGIS

I am having point feature with same latitude and longitude so placed one over other in multiple places. like figure one: I have line feature which having stormID which is same as storm id in point. so ...
0
votes
0answers
18 views

filters.delaunay doesn't work

I have pdal 2.2.0 My pipeline is the following: pipeline = [ input_path, { "type": "filters.elm" }, { "type": &...
1
vote
1answer
39 views

Calculate distance between points and a line and assign it to a table in QGIS [closed]

My question has two parts: How can I calculate the distance between many points and a line (as you see in the photo) and then to assign the values on a table using QGIS? The calculated distance ...
0
votes
1answer
23 views

Joining polygons to points returns no rows?

I'm trying to join a 1000m fishnet grid to a layer of points, so that for each point I can find out which grid cell the point lies in. Both the grid and points layers are saved in a file Geodatabase. ...
1
vote
2answers
50 views

Multiple Points attribute information into one Point in QGIS

I have three points from two layers ( Point 2539 and 2538 from one layer lets say X and point AL101974 from layer Y ) ( Refer figure-1 below). Point 2539 and 2538 has multiple attribute information ( ...
0
votes
1answer
26 views

How to get value of slope in Google Earth Engine of the defined sets of points

I have an reclassify a slope in the, and I have points(ee_kaski) with lat,lng . I want to extract value of the reclassify slope value where this points lies on it. I have tried this using Python API. ...
3
votes
1answer
33 views

Distance between two points (1st layer) inside polygon (2nd layer) in QGIS

I am using QGIS 3.10. I have two layers, first one is point layer and the second one is polygon layer. Every two points (with same ID) in my point layer OVERLAY with single polygon in polygon layer. ...
0
votes
0answers
18 views

Points to GPX: Creating waypoints in QGIS for use in GPS

I'm wanting to create and export GPX point data in QGIS, to subsequently load it into my GPS. I started off by creating a New Shapefile Layer with geometry type 'Point'. The fields list contains one ...
2
votes
1answer
36 views

Join touched lines with point layer in PostGIS

I have a road layer and point layer. How can I merge touching lines into one line where the lines intersects the points (delete pseudo nodes)?
2
votes
1answer
60 views

Extracting nearest point inside and outside of polygon in QGIS

I have multiple storm track data with unique storm track IDs in point data format; Below is example of one track data (all has common storm ID). I am looking to extract the landfall point i.e. came in ...
0
votes
2answers
57 views

Merging SpatialPointsDataFrame to SpatialPolygonsDataFrame in R

I am trying to perform a spatial join between SpatialPointsDataFrame and SpatialPolygonsDataFrame. I have two sets of data named California_shp and Houses. Their information is as follow: dput(head(...
0
votes
0answers
19 views

Reverse Geocoding for NH

I am attempting to reverse geocode points in the state of New Hampshire using the ArcGIS World Geocoding Service. I have set the "Within" distance to 500 and up to 1000 feet but all that is ...
0
votes
0answers
28 views

Calculating chainage distance of points along polyline from start point of line using ArcGIS Desktop

I have road network polylines data with chainages at some specific points along the line. Is there any way to calculate the chainage distance of each points from starting point of the polyline?
0
votes
0answers
20 views

Plot highest value from vector point data

I have multiple data sets assigned to the same vector data point (rock and soil chemical levels in a drillhole). How do I make sure that only the highest value for each point is displayed? The data ...
0
votes
1answer
58 views

Getting error when trying to display points from GeoJSON in Leaflet 0.7.7 [closed]

I tried to display the point from GeoJSON but there is an error: Uncaught Error: Invalid LatLng object: (NaN, NaN) This is my source code: maps.setView(new L.LatLng(-8.203824, 113.175476), 12); ...
2
votes
0answers
69 views

Extracting elevation value (z-value) from 3D polygon at given point with QGIS

I am working with surfaces that limit the growth of buildings or structures near airports, for this I have modeled a series of regulatory surfaces that define the maximum permissible limit that an ...
1
vote
1answer
32 views

Point feature symbol not showing in ArcGIS Online but renders fine in ArcGIS Pro

I've published a map layer of point features with several basic symbols for unique values. One layer that I published a couple years ago is displaying correctly, but a new layer that's almost the same ...
4
votes
2answers
100 views

Creating specific amount of points along line in QGIS

I would like to create a specific amount of points along a line in QGIS. The lines are in different lengths, but I want them with a maximum of 50 points (divide by 50). The tools i've found in QGIS ...
0
votes
0answers
18 views

Extracting XY coordinates from dynamic web map

I am trying to extract XY coordinates/georeference points from a dynamic web map (specifically electric vehicle charging stations). I basically want to download/extract the location of the charging ...
1
vote
1answer
37 views

Moving points in QGis by typing coordinates

I have a .shp point layer created starting from a .csv file in which I have coordinates in GG°MM'SS". It usually happens I need to update a point position with new coords they give me in GG°MM'SS&...
3
votes
0answers
42 views

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-...
0
votes
0answers
39 views

Rasterstats: point_query performance

I register point_query (Rasterstats) as spark udf. My TIFF file size is 720 MB (Japan - entire country data) and trying to query and get raster value using point co ordinates (400K) records. It is ...
6
votes
2answers
124 views

Calculating distance from point to previous point in attribute table

I have a list of points with field data in the attribute table. I want to have the distance between point id₁ and point id₁-1 (previous point in table). Can I write this as a formula in the attribute ...
1
vote
0answers
33 views

Creating Choropleth Map using points in ArcGIS Pro

As seen in the picture, the purple/yellow points represents yes/no, and the location of the points are based on home locations of the respondents. In ArcGIS Pro I would like to create a choropleth ...
0
votes
0answers
18 views

List QGIS projects and their layers as a dropdown in a web page

I have a goal of providing a dropdown on a web page in a React app that lists all QGIS projects on a remote server. I assume that server would be Postgresql/Postgis. Select one of them and you get a ...
3
votes
1answer
54 views

New line layer from point layer

PostgreSQL/QGIS/LizMap environment I have a Postrgre DB POINT layer: -[ RECORD 1 ]+----------------------------------------------------------------------------------- buildingid | 1 nodeid | 2 ...
1
vote
2answers
53 views

Making bivariate proportional symbol map in QGIS

I have data on two characteristics for a particular variable, say volume and quality. I want to plot these using proportional symbol map in QGIS. For Volume, I could plot using: Symbology -> ...
1
vote
0answers
24 views

QGIS Create a new point snapped at a specific distance on a line from the previous point

I am running QGIS 3.10.6 A Coruna I have a train line vector that has geometry of type Line (MultiLineStringZ). CRS is EPSG:27700 - OSGB 1936 / British National Grid. I need to create points at ...
1
vote
0answers
25 views

Connecting all points to each other in QGIS [duplicate]

I have a points layer of about 300 points, and I'm trying to find a way to draw lines between every pair of points (so 44,850 lines in total). I've thoroughly perused similar questions here and tried ...
1
vote
1answer
80 views

Computation of a point location in QGIS

I created grids (A1, A2....,B1,B2,...etc.) in print layout (main properties-grids). I also use atlas. I display many points and I need to calculate location of every point within a page of atlas and a ...
1
vote
1answer
31 views

Point on a Line in ArcGIS Pro

I have multiple points and some of these points are sitting directly on a line which I do not want. You can see the image below. What I need is "to identify the points sitting on the line" I ...
2
votes
0answers
44 views

Create MultiLineStrings segments between points with Python Shapely

I have a layer of LineString and MultiLineString geometries. I'm trying to create a single geometry of the LineStrings split by certain snapped points. This is an illustration of the current data that ...
4
votes
1answer
56 views

Finding the percentage overlap between a vector file and GPS points in QGIS

I am trying to find a way to find the percentage overlap between a vector polygon map and GPS points. The purpose of this is to understand area usage of the animal as well as resource selection. The ...
2
votes
1answer
49 views

Label every polygon with true/false if it contains point

I have large polygon data set and I want to label every one with true if polygon contains point or false if it does not. Polygon can contain multiple points, but if just one point fall into polygon it ...
2
votes
0answers
45 views

Need to join attributes from one point feature class to another based on line connectivity

I need points representing houses to have the ID number of the electrical pole sourcing the house. I would use a spatial join "WITHIN_A_DISTANCE", but some houses have sources that are ...
1
vote
1answer
37 views

Changing symbol and color of vector Layer using QGIS 3 C++ APIs

I am trying to change the default symbol for the point/line/ polygon vector layer using QGIS3 C++ APIs. I was able to render a vector layer with default symbols on QgsMapCanvas. When I try to change ...
0
votes
0answers
16 views

Creating buffers that automatically update when new feature added using ArcGIS Online

Is it possible to create a new feature in ArcGIS Online and the buffer automatically update? I need to create a point in ArcGIS Online and produce the point together with its buffer.
0
votes
0answers
19 views

Different point buffer length left and right in Arcmap

How am I supposed to split my buffer at different length from left and right. I need to make buffer 100m left and 300 m on right. Green is 100m while blue is 300m.
1
vote
2answers
24 views

Intersect two polygons but preserving the shape of one

I have two polygons layers; a selection of land titles and a buffer layer. I want to intersect the two layers but preserve the shape of the land title polygon to show all the land plots that touch the ...

1
2 3 4 5
38