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Questions tagged [point]

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

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20 views

Is there any way to automatically set point? [on hold]

What i want is to automatically set points to an specific objetc. For example: Add automatically points to the cars.
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0answers
32 views

How to add date to point?

I have a lot of points with a GPS tracker and I need to simplify them. I create view (location_view) in PostgreSQL (with PostGIS): SELECT location.id, location.added, location.latitude, ...
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1answer
35 views

Projecting shapefile of point geometries?

I am trying to creating a point shapefile that lies within polygon(a feature layer). By creating point geometry objects and filtering the ones that fall within the polygon(feature layer), I created a ...
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0answers
6 views

Counting Number of Defined Grid Points in a GRIB2

I am looking for a way to count the total number of DEFINED grid points in a GRIB2 file. I am aware of the -npts option in wgrib2 but, this includes both undefined and defined points. I am looking ...
4
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0answers
38 views

Display map tips of superimposed points [closed]

I have created a tabular listing of selected attributes in QGIS as map tips via HTML script. Unfortunately only the information of the uppermost point is shown. Is there a possibility to display map ...
2
votes
1answer
48 views

Distance betweeen classified Points

I got two sets of points. The first set has a unique ID The second set references to this ID (one-to-many). So I merged the two sets. Now every point in the joined table has the X and Y coordinates ...
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1answer
82 views

Create geometry from point data - QGIS 3.4.1

Is there an efficient way to produce geometry from point data using QGIS? Each point represents a feature that may require one or more geometric primitives such as circles, curves or polylines (open ...
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0answers
44 views

Determining intersected end point or first point of line with a point

I do geoprocessing using arcpy that depends on first point or last point of lines. I have problem getting information from lines about end point and last point. How can we find out if a line's vertex ...
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1answer
45 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 ...
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1answer
66 views

Point disappears when zooming in - QGIS 3.4.1

I had a vector layer stored in GeoPackage format with a text field (lbl_text) that was being used to create labels on a map. After creating 3 points I decided it would be nice to rotate my labels, so ...
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0answers
25 views

Direction of a GeoServer point style based on a field (rotation field) [duplicate]

Is it possible to create a point style in GeoServer that based on a field value in that layer (in this example rotation field with values in range of 0<=rotation<360) show the points rotated in ...
2
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1answer
19 views

Error when get the Z value to point from the attribute in QGIS

I have imported point from a csv file with the xyz coordinates in the attribute like this in QGIS. And now I want to add Z value to the point. I try to use v.to.3d to add Z value but I get the error. ...
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0answers
30 views

translate point based on the point side attribute and link direction

I have address points with house number and their side. For instance, there is a point of house number 10, and it's side is Left (whether Right or Left) I also have the link that has relationship ...
2
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1answer
27 views

Combining information of two layers in one

I'm working on population data by catchment area in Albania. I'd like to know how many people are living inside one precise catchment area and in every catchment area. For example in the first ...
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1answer
33 views

Point Cluster in QGIS and Legend

I am using the point cluster symbology in QGIS and have defined the size of each point based on the cluster size using @cluster_size in the size assistant. It looks great on my map, but I cannot ...
0
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1answer
45 views

Defining convex-hull of (clouds of) points using R? [closed]

I have multiple (clouds of) points, and would like to take the outer envelope of these points. This will allow me to polygonize my points. Using the convex-hull would help me, but in some cases, my ...
1
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1answer
28 views

How should variable data related to a point be stored in a database table? [closed]

I've been having a bit of trouble understanding how a dataset is built/managed for GIS applications. Over the past few weeks (part time) I've been trying to understand the basics of GIS, and how it ...
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0answers
16 views

Points and polygon with same coordinate system do not line up in ArcMap 10 [duplicate]

1st, I added a shapefile with projected coordinate system SL_grid_99 to Table of contents. 2nd, I added my points (excel file) to the table of contents. I displayed XY data and exported point data as ...
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0answers
9 views

Disperse markers - trouble with input file?

I had an excel sheet listing addresses that I imported into ArcGIS and geocoded which created a File Geodatabase Feature Class of all the points. I am trying to display the map where it disperses ...
1
vote
1answer
30 views

How to create buffers around points in ArcMap when there is a lack of OID

I want to create buffers around points in ArcMap. Using the Buffer (Analyst) tool, I indicated 100m buffers around my points of interest. I get the error: ERROR 000339: Input price, ads (v8) - ...
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0answers
8 views

Points in hosted Feature Layer causing rendering issues in ArcGIS Javascript API

I have Feature Service in my ArcGIS Online account that is made up of a number of feature layers. The feature service was created by publishing a file geodatabase. I am adding the Feature Service as a ...
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0answers
24 views

How to keep point number when converting to a line

I have a layer of point that I convert to a line with the plugin Point2One to be able to do apply a smoothing with the generalizer tool. It works well! then I convert my layer back to points using the ...
2
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1answer
27 views

How to find the closest stop point PostGIS

I have Point geometries created from lat,lon I loaded all the 10,000 stops in a certain city using gtfs i would like to query my db to find the closest stop reference to my point. the staypoint ...
1
vote
1answer
46 views

Count points in polygon (weighted) for multiple attributes in QGIS 3 in one go

Is there a way to count weighted points inside polygons for multiple attributes at one time? I can count weight points (below) for an individual attribute, which creates a new polygon layer with an ...
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2answers
49 views

Creating Custom Shapefile that can be snapped in location with no dragging using QGIS?

I am trying to create a custom shapefile consisted of 16 waypoints orientated around an origin point. the 16 waypoints are to be 2m apart from the central waypoint (like an axis, with 0 being the ...
1
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1answer
29 views

Estimate the spatial relationship between two sets of points

I have two sets of point data, structured like below. Table A long | lat | class ... | ... | A ... | ... | A ... | ... | A Table B long | lat | class ... | ... | B ... | ... | B ... | ... | ...
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3answers
59 views

Adding value of overlapping point features?

I have several different point feature classes (shape files) spread on a grid, each point (located at grid centers) has a attribute named value. For example, assume we have a 3x3 grid, which has nine ...
1
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1answer
134 views

Showing route between two points in open layers 3

How will I show the route between 2 points? I have created points with below code. var iconFeature = new ol.Feature({ geometry: new ol.geom.Point([8637791.36, 1456487.82]), name: ...
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0answers
23 views

Define polygon with even number of points?

I have the following problem..... I have a client that needs an equal number of schools divided up between 8 different zones. The state I am looking at is the state of Maryland. They want to use ...
0
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1answer
27 views

Calculating distance between multiple points using ArcMap? [closed]

The shapefile I created contains 5 points. Their FID's are (0,1,2,3,4). I need to calculate the distance between all of them. The output table should contain the following info - points to compare ...
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0answers
38 views

Labeling multiple points with coordinates?

I am working on a bridge project. I have point location of all the bridges with multiple years of project. Through ArcMap (10.3.1) I want to label (for years). Since same bridges have multiple years ...
0
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2answers
69 views

Atlas map generation in QGIS using point layer only

I am trying to automate generating maps with Atlas using points only. As the snapshot shows the data points for each village is shown by a color. Every four villages fall under one health area. There ...
2
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2answers
47 views

Performing multiple intersections between two polygon tables and one raster table in PostGIS?

Trying to perform an intersection of an intersection in PostGIS. Its an intersection between a point table, polygon table and a raster table with different number of rows. The polygon table is the ...
0
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1answer
58 views

Spatial distribution based on point data

I have a specified geometric boundry with three data sets that correspond to rainfall measurements at three stations of which two are outside of the geometry and one inside. I would like to find a ...
0
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0answers
48 views

Analyzing single Polygon or Polyline that overlaps itself using ArcObjects?

My current process is to determine obstructions in an area and determine properties of those obstructions as they relate to a center polyline. Per the image below I take a polyline which denotes a ...
2
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0answers
27 views

Creating networks and regions KML in R

I have >500 very large KMLs that contains only point data and a reference to a .png pop-up Each KML looks like this <kml xmlns:xsd="http://schemas.opengis.net/kml/2.2.0/ogckml22.xsd" xmlns:xmlns="...
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0answers
35 views

Disable blue point on anchor with OpenLayers3

I'm trying to move an icon on a map but there is a disgracious blue point corresponding to the anchor position. Is this possible to have an invisible point, please ? And, is this possible to move my ...
1
vote
1answer
67 views

ST_DWithin query throwing 42601 error?

I am trying to get from a particular point more informations about the surroundings (which are also points). So I wrote this: SELECT * FROM osm_point WHERE ST_DWithin(way,(ST_SetSRID(...
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0answers
24 views

ArcGIS loses values during conversion of point to raster

I have feature point and I would like to convert it to raster. I used tool Point to Raster successfully. The problem has occurred when I compared sum of the raster values to sum of the filed from ...
0
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1answer
32 views

Splitting line in proportional parts in QGIS

I have recorded flight paths of birds as lines. Now I want to transform the lines to points, which represent the bird's position in a minute interval. For this I want to divide the lines by the time I ...
1
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0answers
55 views

Point displacement between map (Cesium 3D) and raster (numpy array)

It is better to show than tell: On this image, the layer below the colorful shape is a trivial heat map in raster format. The colorful shape is the product of the skimage.graph.MCP_Geometric method. ...
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0answers
36 views

arcpy.Project_management is projecting points but not polygons? [closed]

In my current project, I am grabbing data from a web service and want to change the projection before inserting into a production db. For some reason when I am projecting the data, some of it is being ...
0
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1answer
33 views

Identifying the greatest value point within each polygon

I have a series of polygons (4,000) and a series of points that exist on the perimeter of each polygon (3 to 5). The points refer to the elevation value which has previously been extracted from a DEM ...
5
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1answer
85 views

Select point by number of overlapping features

I have this polygon layer converted to lines, and had the line nodes extracted using Extract nodes. The resulting point layer has several overlapping points because of common borders with adjacent ...
1
vote
2answers
84 views

Group nearby points and find center point for each group

I'm currently working with a point shapefile derived from OSM that displays intersecting vertices of a road network. This shapefile has had duplicate geometries removed, resulting in a single point ...
1
vote
1answer
27 views

Select/export point features where the value change in two fields within the layer is less than a 5% change

I have a point layer that has two fields representing the distance (in feet) of a point feature to coastline (old distance vs. new distance). I want to crosscheck both fields to see the accuracy of my ...
3
votes
1answer
88 views

Project a point onto a profile tool graph in QGIS

I'm using the Profile Tool add-on in QGIS to extract a profile of a raster data layer. Along this profile there are a series of points which I'd like to project onto the Profile Tool graph so that I ...
1
vote
1answer
159 views

Openlayers 3. OnClick on touch device not triggering perfectly

I have the forEachFeatureAtPixel function and try to trigger an event on click on a point layer with a custom icon. However, the performance on touch devices is really bad. I need to click several ...
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0answers
44 views

How to calculate sum of values in a point shapefile within a moving window

I have a point shapefile that has a 'rank' attribute with numbers between 0-100. I need to calculate the sum of this value for points within a 10km circular moving window anywhere within my area of ...
1
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0answers
40 views

Calculating Moran's I on large point dataframe in R

I have a dataset of about 77,000 points of which I want to test autocorrelation. I have tried to compute the test statistic using the testSpatialAutocorrelation tool in the DHARMa package, which uses "...