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Questions tagged [points]

The tag has no usage guidance.

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14 views

Merging points in Web Application? [closed]

It is a simple project with a Web App through which our customers will be able to pinpoint their address on a map. However, there is a problem. Many customers might put the point of their address on ...
2
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0answers
23 views

Creating points based on time attributes

I have traffic data that shows tracks that have start and end times (in YYYYMMDD-HHMMSS format) and the speed the vehicle was moving. Each feature represents one track (line) with specific speed. For ...
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1answer
26 views

QGIS Join vector point into polygon's

I have groups of vector points (GPS points) in a number of layers in QGIS. I would like to connect the points in each layer into polygons in each individual layer. I have look hard, but can not find ...
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1answer
27 views

how to get first and last point of MultiLineString-objects in qgis3

i would like to identify the start- and endpoints within a set of polylines and return the coordinates of both points finally. so far i have been able to iterate the features and found out that ...
4
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1answer
41 views

Changing the coordinate value of a Pointz object with python

How can I change the X,Y or Z value of a Pointz feature with python in QGIS? I am trying to change the Z values of Pointz with a python plugin. I am first trying to pass the selected feature to a ...
1
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1answer
31 views

Random Point generator - same every iteration? (ArcGIS 10.3.1)

I am generating random points to sample within a stratum. Data Management Tools > Feature Class > Generate Random Points This works just fine, except that I noticed the points I generated for ...
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0answers
16 views

How can I calculate a route between two Points according to a Network and get the links with their attributes along the calculated route?

I have a point table with start- and endpoints. I want to calculate the shortest path between the start- and endpoint. The points are not exactly on the edges of my road network. The ideal result ...
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0answers
40 views

Random points being added in ArcMap?

During our recent work it frequently occurred that clicking outside of the ArcMap window points were added randomly to a Basemap location outside of the ArcMap window. We are working with ArcGIS 10.3....
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2answers
60 views

Android App to help digitizing point layers on a Tablet

In QGIS, using a pen on my touchscreen PC I can I can digitize a lot of points (e.g. 14000 pts in 2 hours) faster than with a mouse: without having the attribute form to show up I simply need to touch ...
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0answers
22 views

How to plot points from a CSV file into a country polygon in Arcmap?

I am trying to import points, which contain longitude and latitude data, to a geographic area (polygon) in ArcMap but they are not overlapping. I have added a point layer (.csv) to my table of ...
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2answers
36 views

How to make the coordinates of point appears as labels?

I am working on a school project that requires us to have a map with the points indicating different station with its coordinates appearing as a label. I just don't know how to do it? I think it ...
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0answers
43 views

Filling polygon with point in PyQGIS? [closed]

I found what seems to answer my question by @xunilk in this closed post: Filling polygons with points or polygons using PyQGIS? I follow the example of @xunilk with some modifications to adapt to ...
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0answers
51 views

Overlapping points in QGIS 2.18.24

On my map I used delimited text layers to plot 5 different categories of points, each a separate color. It seems like QGIS slightly spread out points in each category but completely overlapped points ...
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0answers
27 views

How to get the nearest distance by two point

I'm new here to learn QGIS, But I find some problem that I cant solve, I have two gps data and I add them to Qgis, I connect the points by using Point2One, each of them own more than 1000 points, I ...
1
vote
1answer
62 views

A line between point to nearest neighbour point using QGIS

I have a layer of points in QGIS which represent electric poles How do I create a polyline layer that would have lines running between the poles so it can represent the the electric cables that ...
2
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2answers
40 views

tool for point aggregation and mean calculation

I have the huge number of points spread across some map. Is it possible to calculate the mean value of a parameter in the points of a small area and make one point for the same so that the total ...
0
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2answers
61 views

Loading Point Layers on Smartphone

i calculated some Pointlayers with Qgis and i want to find them in the field. Can i load these points including the GPS-data on mysSmartphone and use it as a GPS-device? Are there any Apps?
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0answers
38 views

Using ArcMap add x y data, points are in wrong location [duplicate]

According to ArcGIS esri when I add a CSV with the "add XY" tool, * "The tool automatically adopts the data frame’s coordinate system"*. Since I'm importing a csv with no defined coordinate system, I ...
2
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1answer
54 views

Is there a way to calculate length of linestring from one point to another?

If I have one linestring and coordinates of two points on that linestring, what is the easiest way to calculate not shortest distance from those two points, but distance over the given road (given ...
1
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2answers
38 views

QGIS: Is there any interactive tool to select previous or next points using fid/attribute table order?

I have a huge point file (4933873 points, currently in GeoPackage)) looking this way: imported from a CSV of following structure: Captured Time,Latitude,Longitude,Value,Unit,Location Name,Device ID,...
0
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1answer
14 views

Display all values in mapserver-layer

I have a mapserver map-file that gets data from postgis-tables. One of the tables holds several linestrings that i set as points in the map-file. They show up based on the zoom-level in my map. Is ...
1
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0answers
71 views

Points won't display on map using OpenLayers 3 and MapServer

Im constructing a Vector-tile map using data from the following site GeoNorge -N5000. Im constructing it using OpenLayers 3 and MapServer with the data being passed from a PostGis database. I've ...
2
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2answers
81 views

Best site location to plant trees

I would need to find out which is the best location to plant new trees on a plot of land I already have. I´ve created a vector file for the plot(polygon) and another one (points) to indicate the ...
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0answers
43 views

Points to a 1km x 1km cell grid

I have a large database of point data throughout all of Eastern Australia. Each point represents species presence/absence data and has attached about 18 predictor variables. To account for sampling ...
2
votes
1answer
58 views

Compute mean attribute value of point features in same category?

I've got a point shapefile wih a column with categorical variable and a column with numerical values like the one below Point | crop | NDVI 1 | wheat | 0.9 2 | barley | 0.7 3 | ...
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1answer
45 views

Generating a table of distances between points and edges of nearest polygons?

I have two shapefiles, one of made up of country borders and one made up of points randomly dotted around an ocean. How do I generate a table of all the distances between the points and the closest ...
2
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2answers
76 views

Programmatically extract edge points from many polygons?

Objective: Extract the four Latitude, Longitude points which correspond to the corner edges of each polygon in the Military Grid Reference System (MGRS) shapefile. How can this be done in QGIS? In ...
2
votes
1answer
253 views

How to create random points inside polygons in QGIS?

Has anyone created random points within polygons in QGIS 3.0? I created multiple polygons and would like to create multiple random points within each polygon. I am trying to have the number of points ...
0
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1answer
125 views

Leaflet - Creating lines to connect GeoJSON points

How do I create lines connecting GeoJSON point features with the same "ligne" data following a given order (Id for exemple). This is what my GeoJSON looks like : { "type": "FeatureCollection", "name"...
2
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2answers
258 views

Save points and lines within the same shapefile

Is it possible to save points and multiline strings within the same shapefile? If so, how?
1
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1answer
25 views

Only output points near borders, excluding points near coast

I would have liked to ask for help, being confronted to a problem with ArcGis. I have in fact a shapefile of countries and a bunch of points. I would have liked to keep only the points that are ...
3
votes
2answers
82 views

Select a specific line length after and before a point

As you can see from the attached image, I have a shapefile of river network (line) and a point shapefile (this one represents the middle point of transects carried out in the area). I'm trying to ...
2
votes
1answer
61 views

Delete points on one side of a line in QGIS

I have a bunch of points and line that represents a boarderline as shown below: I want to delete all the points one the right side of the line, and letting the points in the left side stay. I dont ...
2
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3answers
121 views

Need tool for ArcMap to draw circle touching three points

I need tool for ArcMap 10.2.2 for Desktop to draw circle by (touching) three points. I don't know where the center of this circle and this three points shoud be on the circle line. I have such ...
2
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0answers
40 views

Attributing Points based on Direction

Using QGIS 2.18.16 I am looking at "renaming" or changing the attributes of points to a unique attribute based on the direction of the points. For example A1, A2, A3, then next row starts over as B1, ...
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0answers
16 views

Lost data in saving temp events to point layer. ArcGIS

I have imported an excel sheet and projected the xy coordinate information to a temporary events layer. When exported to a point layer half of the data in attribute table is missing e.g. the field ...
2
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0answers
113 views

Creating a Graph from a lines AND a points shapefile in networkx using read_shp

I am trying to use networkx for analysing networks which I represented in QGIS as a line shapefile and a point shapefile. If I import only the lines shapefile using networkx.read_shp('lines.shp') I ...
1
vote
1answer
108 views

3D Points within 3d Polygon in PostGIS

I've been working with PostGIS for a while now and I'm able to run queries over huge datasets fairly easy and fast. However, I do have an issue now that I don't know how to solve. I did find some work-...
0
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1answer
84 views

Listing all points in polygon geometry using ArcPy? [closed]

Based on my understanding in coding, I thought the following code will list me all points in every polygon in workspace: arcpy.env.workspace=r'D:\test.gdb' rows=arcpy.da.SearchCursor("Building","...
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0answers
20 views

Ghost points in LineString

I am getting Ghost points in linestring (marked in blue circles), when I check the attribute table it has no data regarding the Ghost points. So I tried to play around with it using NodeTool, and it ...
5
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0answers
329 views

Using QGIS 2.14 to creating a evenly distributed grid of points, spaced 500m apart, that takes terrain into account [closed]

I am using QGIS 2.14 (Essen Version). I need to create a grid of points within a given area so that each points 500m across the ground from any other point. At these points trail cams will be placed,...
2
votes
1answer
69 views

In QGIS all my points end up at 0,0

I have been trying to import a CSV file into QGIS 3 on Linux. I end up with all my points at 0 lat and 0 long, off the coast of Africa. They should be in Florida. I cannot find this same issue in the ...
1
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3answers
97 views

Merge overlapping points in the same layer by maintaining both attbributes

I have a road network layer where each line segment is broken off by intersecting line features. I ran the intersect tool to create points along each line intersect to represent 'Intersection' point ...
1
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0answers
97 views

R GIS - Error when converting SpatialPointsDataFrame to raster : 'data' must be of vector type, was 'NULL'

I would like to convert a SpatialPointsDataFrame into a fine raster (5m resolution), using R GIS. My SpatialPointsDataFrame is made of 593 points, equally distributed along a 8km-grid. Their ...
2
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3answers
119 views

Dynamically update points with xy coordinates in table

I have an Oracle database table with columns for 'X' and 'Y' coordinates. Now I want to display these points in ArcMap. I can use the 'Display XY data' tool for that. My table in the database with XY ...
1
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2answers
79 views

Point data location to be set by Polygon ID

This might be stupid but I am trying to put points collected on the field to match the location from where they were originally collected. AS the X and Y coordinate of the point might not match the ...
1
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2answers
54 views

Count number of Points within a varying distance

I have a set of points (roughly 500,000 houses), and I would like to compute how many other points (sea buoys) are within a radius of each house. The search radius for each house is its distance to ...
0
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2answers
96 views

Creating points on either side of the line at specified intervals [closed]

With the tool "Generate points along line", it creates points along the line which I don't want. I Want the distance between two alternating points (zig zag) should be 250m and between the distance ...
2
votes
2answers
432 views

Calculate distance to points along line in ArcMap?

I have two shapefiles: a series of points and a polyline created from the points with the tool Points to Line. Both shapefiles have the same projected coordinate system with a linear unit in metres. ...
0
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1answer
85 views

Adding m value to points using ArcMap? [closed]

I have used Points to line to create a polyline from a series of points. I want the points to have attributes with m values corresponding to the distance from the start of the line. There is also a ...