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

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1
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0answers
12 views

3d model to point cloud

Excepting FME, is there a way to convert 3d model to point cloud?
2
votes
2answers
21 views

Assigning values of points outside a buffer to points within a buffer

I have 10m buffers around line features and a point shapefile which has some points intersecting the buffer. I would like to take each point that falls within the buffer and assign it the value of the ...
0
votes
1answer
14 views

Add point button missing from CartoDB?

I'm trying to add a point to a map that already has points (table imported from a public source). However I do not have the 'button' on the right hand side in my 'map view' to be able to add in my ...
0
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1answer
31 views

CartoDB: How to I cluster by features? Is it even possible?

I have a set of points for a number of buildings in NYC. I would like to group those points into clusters per their respective neighborhood (ex: Chelsea, Upper East Side etc.). Each of my points have ...
1
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1answer
32 views

Mixing POINT and MULTIPOINT in PostGIS table

I'm trying to load a bunch of GeoJSON files into one PostGIS table. I get this kind of error: Warning 1: Geometry to be inserted is of type Point, whereas the layer geometry type is Multi Point. ...
3
votes
1answer
129 views

Is it possible to update only latitude or longitude in postgis?

I have a postgis database that contains Points created based on a couple (longitude, latitude), and I need to update only one of those two for a given point. I found that it's possible to do so but ...
1
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0answers
29 views

Geotagging photos with Point Shape via Time Stamp

I have waypoints which I marked with a gps device - unfortunatelly no track/route. And I have photos which I took at the same day. Now I want to interpolate the points to line and use this line to ...
3
votes
1answer
133 views

How to map flood areas from a set of points containing surface and height of water?

I am working on the damages made by the typhoon Haiyan. I use QGIS 2.0 with extensions and toolbox, and MapInfo. I have vectors, rasters of the place. I want to map the flood area along the ...
0
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0answers
10 views

Creating a point in a fixed distance and course

How can I create a point in a fixed distance and course from an existing point using the Microsoft SQL SqlGeography object ?
1
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1answer
57 views

Creating polygons layer from point layer with conveks buffer

I have a point layer of >750000 points representing dwellings with district heating. Now, I want to create polygons for every n of points with a distance of n meters to the next point. I have a ...
9
votes
1answer
285 views

Measuring distances between simultaneous points

I am working with GPS data and so I have UTM's with DATE/Time information. I have 2 groups of species (moose and wolves). I want to join the information from moose to wolves that match in time. So, ...
1
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1answer
37 views

Reduce number of points, keeping most recent data within a given distance

I have a HUGE dataset of points that were collected along a route. The data may change daily, and the most recent data is the most important. What I would like to do is take only 1 point from a given ...
0
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2answers
45 views

Loop for exporting shapefiles from an existing shapefile

Hello i have a pnt shp with 50 pnts. I want to export each one of it in a separate shapefile with arcpy writting a loop. My problem is that i want the output name i create has a different name, e.g. ...
1
vote
2answers
39 views

Moving labels after converting to annotation in ArcGIS for Desktop?

I'm trying to move some of my labels individually around some of these points so that they don't overlap with each other or crowd each other out. When I converted them, I chose to store the ...
0
votes
0answers
27 views

Point to Raster Converting Result

I had a problem with Point to Raster converting result. I had an Excel file which contains x, y and z values. I wanted to create an individual raster data from classified z values so I planned to use ...
1
vote
1answer
22 views

is there an operation for measuring constancy (ecology)

I'm looking for an effective way to measure changes in spatial location in a time series data set (whether an observation repeats in the same location between successive time-steps, or if it shifts ...
2
votes
1answer
27 views

Create Raster Surface from Points and Equations in ArcGIS

I want to use point data to create a raster surface which distributes the values over space, as defined by an equation, and NOT by interpolating. I have an equation to describe how the characteristic ...
1
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1answer
34 views

How to delete duplicate LiDAR points?

How can I delete duplicate lidar points. I incorrectly read the same las twice and saved as a one file resulting in duplicate XY points. How should I delete these duplicate points?
5
votes
1answer
2k views

How to remove duplicate point features?

I have created many .gpx datas with my Garmin device, but due to the amount of data, I have imported the mapping data from my device several times (also because I didn't want it to be lost)... As a ...
2
votes
3answers
406 views

Draw line between points from multiple datasets

I have 2 point datasets and want a tool or script to draw a line between all points in one dataset to all the points in the 2nd dataset. Is it possible? I have tried ESRI "Point Distance" and ...
1
vote
0answers
42 views

Creating one dataset from several overlapping point datasets using ModelBuilder?

I am trying to build a model in which I create 9 point data sets that are subsets of one large point data sets. The 9 small point data sets are suitability analyses for tree species. So one point can ...
0
votes
2answers
235 views

How to extend polylines to the nearest point

Hi could anyone tell me a way of getting my polylines to search for a point within a certain number of meters of their start/end points and extend to it? edit: There was some broblem uploading a ...
2
votes
1answer
353 views

How to obtain closest point of point over polylines layer in PostGIS 1.4 (without st_ClosestPoint)?

I´ve got a polylines layer (pipes) and a points layer (valves) and In Postgis 1.4 I would like to obtain the closest points but exactly on the closest polyline. In other words, i need to locate each ...
1
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2answers
104 views

How to automatically convert dots on paper maps to vector points?

I have several paper maps with dots that I need to convert to vector points. I was hoping to get some suggestions on how to accomplish this without recreating each and every point by hand. I know ...
2
votes
1answer
36 views

How to add point features with coords taken from a .txt and show them on the map canvas?

Ok, so i am on Windows 7 and using QGIS 2.6 and i have a .txt file with some simple coords. I have extracted the coords to a list, no prob with that. But i looked at the PyQGIS cookbook on how to add ...
-1
votes
1answer
55 views

Single point in R

My question might be very simple. I want to create a single point (with xy coordinates) in a specific region, in a specific position. I don't want to do that with qgis I want to do that in R. Is there ...
5
votes
1answer
295 views

QGis 1.8 fails to rotate point geometries with rule-based style

I have to do some visualizations in QGIS (1.8.0) and up to now I've been very happy with the new Dialog "Layer Properties -> Style", using the rotation-field to rotate Point-Geometries visualized by a ...
1
vote
1answer
31 views

create a zip code value to points

I have a shapefile of points (samples collection locations) with their longitude and latitude and the number of samples collected in each location. My goal is to create a raster of the number of ...
2
votes
1answer
37 views

Is there a better way to convert Raster to Point data? Don't need one point for every cell

I need to convert raster data to point data so I can use the points for interpolation via kriging. My problem is that my resolution is 5 ft and I'm working on a whole city. The data I am converting ...
14
votes
4answers
5k views

How to join attributes from nearest point in QGIS?

I have two layers with points, call them A and B, each with different attributes. For each point in A I want to join all the attributes from the nearest point in B. Ideally this would also include ...
2
votes
1answer
43 views

How to create one random point per grid cell? (i.e., systematic sampling with randomly placed points)

Using ArcMap, I have used the Fishnet tool to create a grid of 1km squares. I am looking to create random points so that there is one (randomly placed) point per grid cell, with a minimum distance of ...
1
vote
1answer
51 views

ArcGIS geometry update from table XY

I am trying to update the geometry of a point FC stored in a FileGeodatabase using ArcPy. I got this Python script to compare the values of the SHAPE@X and SHAPE@Y and change the Geometry if not ...
1
vote
2answers
563 views

QGIS create layer with the points of the beginnings and ends of a polylines layer (without duplicate points)

In QGIS, i would like to create a new layer containing the beginning and end points of a polylines layer, but without the duplicate points that would result of adjacent polylines.
4
votes
1answer
46 views

Calculate distance from all points to all lines within 10km using FME?

I have a polyline shapefile and a point shapefile. The points are along the polylines. There are over 100 lines and over 10,000 points. I want to calculate the perpendicular distance from every ...
2
votes
1answer
30 views

Point to Raster vs Feature to Raster

I am converting point vector data to a raster dataset using nearest neighbor. I am using arcgis 10.2. The first step is to use the conversion toolbox, but there are two possible options: Point to ...
3
votes
2answers
744 views

Calculating the distance between points and multiple lines?

I have a point shapefile of about 100 points and a polyline shapefile of about 200 lines and I am interested in finding the distance between every point and each individual polyline. My polyline ...
1
vote
1answer
25 views

Is there an out-of-the-box way to manage 1:n data in QGIS?

I think an image explains the question best: What I basically want to do is select the object, view its attributes and from there call the second table to view/edit/add status entries. Since I ...
0
votes
2answers
355 views

Get points along a polyline at defined distance c#

I need to store into my array the points along the polyline at each defined distance. Example: The Polyline length is 50m, I set the interval to 5m. I have to store in the array all the points along ...
7
votes
6answers
12k views

Creating polygons around extent of similar points using ArcGIS Desktop?

I've millions of points collected for lithology layer. They have used a coding for different types of rocks. I need to create a polygon around the extent of similar points. What is the easiest ...
5
votes
4answers
2k views

How to randomly subset X% of selected points?

What methods are available in ArcGIS 10.2 to randomly subset a selection of points. For example, in the attached screenshot I am interested in keeping 20% of the selected points and deleting the ...
1
vote
3answers
44 views

Appending interpolated or nearest raster cell value to vector point on a cell with no data?

I have been searching for a solution to this problem, but was not satisfied by the answer given in Finding nearest raster cell value based on vector point? I have some points that land on cells ...
0
votes
1answer
33 views

Pasting Point goemetry with Z and M values to Simple Point Geometry

This should be kind of easy but I'm looking for a best practice scenario. I just tried adding 14 points from a point shapefile into another layer in our ArcSDE database. I assumed the layer in SDE was ...
0
votes
0answers
55 views

What's the best way to convert points to raster and back again?

To convert raster grids to vector points In QGIS there we have different possibilities (grass tool "to.vect"; saga tools "grid values to points"). My problem is a little bit complicated. In the ...
1
vote
2answers
76 views

Shapefile created in QGIS will not display properly in ArcGIS

I was asked to created a point shapefile of a cemetery. The points display correctly in QGIS but not in ArcGIS. I think the issue is with the coordinate system I created it in (WGS 84 / UTM zone 17N). ...
2
votes
2answers
54 views

Why do I get green crossed circles instead when I try to move a point?

It's really horrible I must say. I sometimes have geometry issues and then try to go one by one through them and fix these cases. Therefore I mark the area points and delete them for instance. After ...
4
votes
1answer
5k views

Create point in intersections of two layers

I have two layers. One of them is 'Road_line' and another one is 'forest_shape'. I want to create a point layer that has points in intersection of that layers. I couldn't find any tools for it.
0
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1answer
39 views

Create polygons from point dataset, where each polygon contains 3 points from the dataset

I'm using qgis Brighton I have a dataset of 1500 points. I want to create polygons, where each polygon contains n=3 points from the dataset. The aim of this is to have clusters of 3 points, which ...
3
votes
2answers
85 views

Analysis of lines in a point in QGIS

I have 33 layers, 1 with points and 32 with lines. I want to extract/highlight the points where more than one line is intersecting. I have tried with buffers but I'm not getting anywhere.
1
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0answers
31 views

Calculate Sum on One Field Within Several Different Point Feature Classes?

I have several point feature classes (eg: the location of mall, liquor stores, etc), that I need to get the count of within a specified city district. Basically, I want to great a modelbuilder model ...
12
votes
2answers
845 views

How much sense does it make to average (lat,lon) samples in order to increase 2D accuracy of a GPS location?

Several GPS applications, like this one, or this one, acquire multiple (lat,lon) samples of a given location, assuming that the GPS unit is not moving, and then take an average of the samples in order ...