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

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4
votes
0answers
47 views

How can I average point features spatially in QGIS?

I have a GPX file with track points and I want to average the points spatially to improve accuracy of the point feature. I can't just make a polygon and find its centroid as the number of overlapping ...
2
votes
2answers
38 views

How to visualize updating lines of bearing from a point

I'm working on a project where I need to visualize a constantly updating line of bearing from a point, based on degree of rotation around that point. My plan is to design a line feature with an ...
2
votes
1answer
70 views

Create points symbology with more than one parameter

In QGIS i would like to create symbology for points layer where the symbology will take into account more than one parameter (currently two). i.e.: My points layer has street names and house numbers ...
0
votes
0answers
15 views

multiple attributes in csv file to raster

I have a several large comma separated text files each with multiple attributes. Each text file is about ~2.9 GB with 21 million lines. Each line contains X, Y, VALUE1, VALUE2, VALUE3, etc. The X and ...
5
votes
1answer
169 views

Why aren't there LiDAR records in some black and white parts of the scene?

This is the actual scene: This is the corresponding LiDAR scene: The LiDAR data is from xyz file. The questions are: Why are there no points for the dark squares on the checkerboard as well ...
0
votes
1answer
42 views

How to remove points in QGIS?

I have way points of my field work, but some of points I saved are not related to my project. How can i remove them in QGIS?
3
votes
1answer
50 views

Find all points within 5m with same name on large dataset

I have a large dataset (500,000 rows) in cartoddb which contains data like this.(abbreviated for easier typing) cartodb_id | count | lat | long | name | the_geom 1 ...
0
votes
0answers
16 views

Space points out a minimum distance along a line

I have just snapped thousands of points to the polylines they share attribution with but a lot of the locations overlap slightly. I would like to create a minimum distance between points. I DO NOT ...
2
votes
1answer
19 views

.net arcobjects delete point feature by one of the attribute value

What I want is to delete a feature by objectID, currently I have got the objectID of the related feature, but I have no idea how to delete the feature, can anybody give me some advice? The ...
2
votes
3answers
68 views

Finiding Duplicate in buffer distance?

i am desperately looking for solution for one problem. i am having one Point Shape file, i need to check that if there is any duplicate point nearby(lets say 10 meter). i am not familiar with ...
1
vote
1answer
22 views

Finding Point Counts in Multiple Ring Buffers for Multiple Point IDs Using Python

I have a shapefileA that has 13 points. Each of these points is coded with a unique ID from A to M. I created 10 different buffers (representing different distances) around each point via the ...
0
votes
1answer
17 views

Comparing distances between old and new Esri geocode locator points

I need to check the accuracy of the locators between Esri's Streetmap 14_2 and Streetmap 15_1. The two layers need one to one distances measured between points that have the same attributes i.e. same ...
0
votes
0answers
24 views

Creating an interactive map that uses a point shape file to display information

I have a raster map, a PNG of a fantasy map, which has points on it. I want to create a interactive map that displays information (text) whenever you click on a point. An example of what i'm after ...
1
vote
1answer
31 views

Extracting the closest Point to a Line within a Polygon using ArcGIS for Desktop

I have the following shapefiles: Polyline: Detailing a road network. Polygon: Containing approx. 2000 polygons enclosing sections of that road network. Point: Containing numerous (OS Addressbase) ...
0
votes
0answers
14 views

How to access point maker

I have been trying to create random points on ArcGIS, my problem is I want them to be circular and have uniform distance between them, was reading somewhere and found out there is a script called ...
0
votes
0answers
13 views

How to load points in a SQL server polygon table?

I have a spatial table in SQL server which stores both points and polygons geometry and I am using the table to return geoJSON for API calls. I want to load some points to this table with shapetype ...
0
votes
0answers
14 views

QGIS and Ghydraulics: add attribute fields from intersecting points to line layer

I have lines (pipes) and points (junctions). There is one point at each connection between two lines, so that every line has a start and an end point. Now I want to fill the attributes "start point" ...
0
votes
1answer
23 views

Extracting point data / WMS out of (browser) geoviewer

How do I extract point data out of a browser-based map? In particular, I need the park and ride points from http://wegenenverkeer.be/carpoolparkings, but I cannot find their WMS or shapefiles, ...
1
vote
1answer
44 views

Update xy fields when I move points?

I have a point shapefile in edit mode, containing x and y coordinates. When I move the point to another location, the x and y coordinates do not update to the corrected location. I realize the x and y ...
0
votes
0answers
35 views

Multiple points showing as single point in ArcMap

I have a shapefile containing numerous point features with different coordinates showing the locations of schools for an area. When I add this file to a blank map in ArcMap all of the separate ...
1
vote
0answers
29 views

need to split some linestrings by points

please help me, i'm new in gis 1) i have а table with geom railways, which are multilinestrings (for example there are 2 ways one of which is interrupted, so this way will be multilinestrings ...
2
votes
2answers
132 views

How to calculate distance between points on a line in arcgis?

I created a series of points along a line (as a single feature point), in ArcGIS 10.1. I want to know the distance from one point to the next point along a line. I would also like to know the simple ...
1
vote
3answers
57 views

Generate line from unordered set of points

What is the best method to take a set of points and generate a line? There are too many to simply guess a "connect-the-dots" situation & These points do not have an attributes in which they can ...
0
votes
0answers
18 views

Defining and exporting a path from discrete points in QGIS

I'm working with elevation data (NED, SRTM, etc.) in QGIS and I'm wondering how I might be able to pick a set of points from my map and export the coordinates to something like CSV. For example, I'd ...
5
votes
1answer
156 views

How to find all points with certain elevation difference between them in QGIS

I have a point layer (xyz) and want to find all points that have elevation difference of 200m or more. I would like to then draw a line between each pair with the largest elevation difference. The ...
1
vote
1answer
22 views

Grouping points based of user-provided distance in ArcGIS for Desktop?

I have a point layer and I need to group/aggregate the points within a 1km proximity into 1 single point to create a new point layer. I was trying to use Aggregate point and then Feature to point, ...
0
votes
2answers
40 views

Changing sequence of point features into order along line using ArcPy?

The picture below shows that the order of attribute record for point features is different to their actually distributed location. How can I change or sort the attribute records into a proper order ...
2
votes
1answer
33 views

Automating Line Creation with Multiple Points

I have a feature class that has over 1500 points in it. I then need to create line segments from these points based on an ID number. For example points 1-6 have the ID 1, points 7-12 ID 2 etc. Each ...
2
votes
1answer
51 views

How to detect if point is on the left or right side of the line in PostGIS

I have a linestring table and a point table in postgis. I know the closest line to any given point. What I need to know is on which "side" of that line is the point. I guess I have to do that by ...
1
vote
1answer
28 views

Django Postgis Distance from point

I have a point where the objcet is and another point for mylocation. I want to calculate the distance >> object_location <Point object at 0x7f9ceaac7be0> >> mylocation <Point ...
1
vote
0answers
27 views

Error in Editing Point Shapefile: I can't add a new point feature

I want to add a point to a point shapefile. I place the cursor in an empty field. The strange thing is that the point of the point shapefile that is nearest to the cursor is highlighted. If I click ...
5
votes
2answers
230 views

Boundary from Points

I have a point cloud and need to process a very detailed boundary around the outer points. Is there a tool in QGIS? Convex hull is not detailed enough. Thank you!
0
votes
0answers
25 views

Making raster from vector

Have you ever met with nan value in raster? Im making raster in qgis from vector (one point) and all I have got is nan value and black raster.
0
votes
1answer
33 views

Highlighting point using ArcGIS API for JavaScript?

How can I highlight a point using ArcGIS API for JavaScript? When I use the function of centerAndZoom, I also want to highlight this point.
0
votes
0answers
53 views

GeoSever PointStacker Renders incorrect position

I've been trying the GeoServer Rendering Transformations - Point Stacker. According to this docs there's an optional cellSize parameter for setting the "Size of the cells in which to aggregate points, ...
1
vote
0answers
33 views

Assigning Raster Cell data to Point data

I have 23 sets of raster data for different types of habitat (which I have performed Block Statistics on in Arc10.2, in order to create a 1km grid). I also have 5 different Sets of point data showing ...
0
votes
1answer
68 views

How to create soil-type maps using QGIS

I am trying to create a soil-type map of an area from point data using QGIS. I tried interpolating the data, since soil is continuous. I did this by allocating a number to each point type and then ...
2
votes
4answers
100 views

Export ground returns (.las) from classified point cloud

I have lidar data that is classified as several categories (water, ground etc.). I need to open this lidar data in some software (it will be great if it would be a open source software) and delete a ...
2
votes
1answer
87 views

Standalone Python script to split a polyline with a point layer

I have a polyline layer and a layer of points that are on top of the polylines. I do not have the ArcGis advanced license so I can't use the Split Line at Point tool. Can someone help me with a ...
1
vote
0answers
65 views

ArcMap Point Distance giving decimal degrees even when in projected coordinate system

I'm trying to calculate pairwise river distance among 60 XY coordinates in a small region of Mexico with ArcMap 10.2.2. I have defined my projections and projected both my stream network and XY ...
3
votes
0answers
33 views

Extract the outer points of a Point Shape into a Line Shape? [duplicate]

I've installed QGIS 2.8.2 since a few days and have no experience with this application. I try to extract the outer points of a Point Shape into a Line Shape, like a shell for the inner points. All ...
4
votes
1answer
51 views

How to find the distance from a point to a polygon, via another point, in R

I am trying to calculate the distances between a central point, and the edge of a polygon, along straight lines drawn between the central point and another set of points (where necessary extended ...
0
votes
1answer
16 views

Assigning an NTA code to a point feature class from a polygon feature class

I have a point feature class and a polygon feature class (NTA - Neighborhood Tabulation Areas). I want to assign each record in the point feature class an NTA that it falls into. Also, neither of ...
1
vote
1answer
79 views

finding the nearest point along the edge of a polygon

I have a polygon shapefile which represents a study area (island). I also have a point shapefile representing some villages. What I am after is to locate for each village point the nearest point along ...
0
votes
1answer
48 views

Calculate distance between two coordinates along lines

I have a map with two layers: a map of the streets of Montevideo, and a map of shops with the lat long location. I would like to calculate the distance between each shop and the nearest one, along the ...
1
vote
0answers
36 views

Getfeatureinfo is not working with geoserver point line sources

I'm not able to get information with Getfeatureinfo when clicking on point & line layers. For polygons it works fine. I'm using the code below to execute the WMS service: google.maps.event ...
1
vote
1answer
28 views

Getting NULL-values when point sampling USGS (SRTM 1 Arc-Second Global) grid (QGIS 2.8.2)

I use the Point Sampling Tool in QGIS to transfer gridvalues (of DEMs) to point features. This goes well with grids from f.i. MapMart (SRTMHARRIS_DEM), but I get only NULL-values when using grids from ...
6
votes
3answers
136 views

Waypoints with coordinates in R

I have a SpatialLineDataFrame with 20 observations of 4 variables (in WGS84). I want to create waypoints every 10 meters. Every waypoint will has the x y coordinates. I tried to do it manually like: ...
0
votes
0answers
20 views

Issue when creating points with php and entering them in postgis

I pass some data to a postgis table defined as: CREATE TABLE categoriesdata (id serial NOT NULL, name character varying(200), geom geometry(Point,4326), CONSTRAINT obj_geom_pkey PRIMARY KEY ...
1
vote
1answer
41 views

What is CID field created by Create Random points?

In ArcGIS the result of Create Random Points tool when using a feature class to constrain the extents has an attribute called CID. What do the values in this field represent?