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

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16 views

How do I generate a sampling path by numbering points?

I need to number points from left to right and then the next row of points the numbering must continue from right to left, then again from left to right the row thereafter - and so on, and so on. ...
2
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0answers
28 views

Adding attribute data together within multiple polygons in QGIS? [duplicate]

In QGIS I have two vector layers, the first is a set of polygons and the second is a series of points. Each point has a numerical attribute associated with it and is located within one of the ...
3
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1answer
81 views

Rotate symbols perpendicular to line angle (QGIS)

I have lines representing curving streams and want to angle symbols at various points on the streams so that they are perpendicular to the angle in their particular locations. What QGIS seems to do ...
2
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1answer
99 views

Selecting features of vector layers based on another vector layer using QGIS?

I am using QGIS 2.12.2. I am using three vector layers (point, polyline and polygon shapefiles) of the region of interest. Any advice in making the selections from one dataset based on the other ...
1
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1answer
99 views

How do I assign elevation labels to a custom set of points in QGIS?

Im trying to create topographic surveys using georeferenced images from a drone and a DEM/orthomosaic which has been created using Photoscan. I've managed to create contours and label them with ...
4
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1answer
49 views

Is it possible to locate a specific marker point on a raster using python and use that location for georeferencing

I have several scans of the same map, which I would like to georeference. I can not use arcpy.WarpFromFile_management(...) as the rasters are slightly different due to scanning. Is there a ...
0
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1answer
41 views

Connecting two points in ArcGIS for Desktop?

I have two types of point shapefiles. These two points are linked with another attribute table. Each Point from column A is linked to single/multiple values in column B. Each of these object_IDs have ...
2
votes
1answer
112 views

Trouble adding proportional circles on top of symbolized polygon in ggplot2 map

Data: Zipped ea.ml1 shapefile can be found here, and the country outline can be downloaded here at the GADM site. I've been using the Ethiopia ESRI shapefile. Branch locations are here. Per the ...
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1answer
57 views

Connect multiple 2 points with a line in ArcGIS?

I have a table in which each row has two columns representing the objectID of two different point features in the Map. There are thousands of such rows. How do I connect the each of these two points ...
4
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2answers
94 views

Add a point on a spplot in R

I have to add a point on a existing spplot in R. I need it only for a visual purpose. I have the coordinates of the point, but I don't know how to change the code in order to add the point. This is ...
0
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1answer
35 views

Snapping point to point nearest to it in ArcGIS for Desktop?

I am using ArcGIS 10.3 for Desktop. I have 2 point features centroid and station. I want to snap all the points of centroid to the nearest point in station such that centroid is only snapped with ...
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0answers
214 views

How to add marker dynamically when clicked on map using OpenLayers 3?

I'm trying to add point (marker) on map click with custom style using OpenLayers 3. I tried this code, but nothing happens when user click on the map: var map = new ol.Map({ layers: [ ...
3
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1answer
69 views

Is it possible to create points that represent lines in QGIS 2.8.Wien?

I want to create points to represent lines from a line layer. This is similar to creating points to represent polygons. Does anyone have an idea on any useful plugin or the best way to do this?
4
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1answer
52 views

PostGIS point distance from polygon not 0 when on edge

I have a pretty simple problem: SELECT * FROM ST_Distance(ST_GeographyFromText('POLYGON((70 -40,70 -39,71 -39,71 -40,70 -40))'), ST_GeographyFromText('POINT(70.48 -39)'), False) returns ...
3
votes
3answers
385 views

How do I plot points as graduated/proportional circles in R?

I'm back again with more R mapping questions! This one is concerning symbolizing points by a certain attribute with graduated/proportional circles. DATA: My full code can be found here if you're ...
3
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2answers
80 views

Select point(s) from given coordinate and move to new coordinate using arcpy

Goal: Move address points to their correct location. Plan: I have a layer of AddressPoints of which some need moved to a new location. I want to take a line layer (called ...
3
votes
1answer
96 views

QGIS 2.12.1 - Problem with Size Assistant in „data defined override“ Button - Error message

While trying out the Size Assistant feature I encountered a problem. I´m working with this csv Table: I tried to resize the Point Size based on the field „Anzahl Objk“ and to do this I went to ...
2
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1answer
60 views

Complex polyline traversing with searchcursor

I have a very specific question about searchcursor traversing complex polyline. My setup is: I imported public transport routes as a single polyline with length in meters. Along this polyline I want ...
8
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1answer
69 views

How can I export a list of points as a matrix in ArcGIS 10.0?

I have a grid made of points (see attachment) with values for altitude extracted from a DEM. I need to export these values not as list, but as a matrix of size 50x50 to be read in SciLab. The grid is ...
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2answers
52 views

Creating new feature class based on x- and y- coordinates?

I need to create a new feature class with four different points on it from various x- and y- coordinates. What is the easiest way to do this? Step-by-step instructions would be helpful. I should ...
3
votes
2answers
86 views

Styling point displacement for 2 variables QGIS?

I have a dataset with multiple sampling events that I want to style by season (or "temporada" in my attribute table) and "EP Chinook". Data is from a csv file. I styled with point displacement to ...
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0answers
14 views

Trying to perform kernel density analysis but obtain: 'error all input points identical' or 'error in executing grid expression' [duplicate]

I am trying to perform a density analysis of a point shapefile on ArcMap. I am unsure of what to insert for population field. I've tried the actual number of people in the census tract where my point ...
0
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1answer
203 views

Spatial Join in R

I'm fairly new to using R for spatial work so bear with me. I have found questions similar to this but nothing that answers this question specifically enough for me to implement it. I have point data ...
2
votes
1answer
74 views

How to do spatial join in FME by preferring points with same attribute

First of all, I'm new to FME, but I'll try to be specific with my question. I have two different shapefiles with point features. These points have information on bridges and overpasses etc. but are ...
2
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1answer
36 views

Why there is no “View Output” button for the command “v.to.points” in Grass plugin in QGIS?

How do i get or where do i get my output vector point layer after i run the command v.to.points to my vector line layer?
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1answer
46 views

coordinates in Australia not lining up

I have the following set of points (there are far more). Originally they were given to me without any decimals. I was able to correctly plot them into arcmap however they don't line up with my other ...
2
votes
2answers
90 views

Place point label perpendicular to line segment

I have a point shapefile with attributes and I want to make the label be perpendicular to a line shapefile, is this possible? Basically my points represent houses and I want the house label to show up ...
1
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1answer
46 views

QGIS points filter

I'd like to use the points filter tool in the QGIS processing toolbox to remove errant gps points from data i'm looking at. I've had limited success playing with it and I was hoping someone who is ...
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0answers
31 views

Extracting distances along a line from postcode a centroid to the nearest point (bus stop)

I'm looking to measure the distance from postcode centroids (point file) in a city to the nearest bus stop (point file) along the road network (line file). In Qgis I can calculate the distance but ...
1
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0answers
32 views

Point and Polygon Data refusing to display: corrupt data?

I have two sets of shapefiles, one point data and one polygon data. Both were sent as part of a bigger set of data. Neither the point or polygon data will display when loaded into QGIS. The raw data ...
0
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0answers
41 views

How to extract cross pattern in point data based on heading field, automated using ArcPy

I'm trying to automate a process to identify and remove a cross pattern in point data, as seen below: This picture shows the points colored by heading (degrees from North), with the exception of ...
0
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1answer
102 views

Obtaining road distances between each pair of points in point feature class using ArcGIS for Desktop?

In Calculating attribute for network distance between multiple points in ArcGIS Desktop?, an explanation has already been given how to find road distances from a certain point to each point in another ...
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1answer
70 views

Copying point features along line features by predetermined distance

first post here. I searched the forum for this issue but other cases were slightly different. Anywho... I have points in a feature class. Each point has its centroid on a unique line feature in a ...
2
votes
2answers
145 views

Merge single points to multi point geometry

Is it possible to transform a point shape file in single part geometryy to a shape file with multi point geometry based on a attribute. e.g. in the shape are 50.000 records in 700 categories, now i ...
3
votes
2answers
124 views

Projection for Calculating Distances in Continental United States?

TL;DR Question: I want to calculate distance from point to edge of nearest polygon for 2,000 points in Continental United States. What is the best projection to use? Full Question: I have two ...
1
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1answer
87 views

How to merge two point feature classes based on spatial location using ArcPy?

I have two point feature classes, each containing about fifty points. These 2 point feature classes should be merged, or the points of feature class 2 added to feature class 1, as feature class 2 does ...
1
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1answer
48 views

How to determine which points fall within a certain value in a polygon in QGIS?

I have a shapefile that contains different levels for food security. On top of that, I have mapped points for certain office locations. This is shown below. The country shapefile is extremely ...
2
votes
2answers
71 views

Densifying polyline to generate points at set distances using ArcMap?

I have a polyline, that I wish to create points along using ArcMap 10.2.2. I used the methodology suggested here, but I do not seem to be able to generate the points at the set intervals I desire. ...
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0answers
83 views

How to measure nearest neighbor in miles or kilometers between two point layers using QGIS?

I have tried to look for an answer to this question, but cannot find an adequate solution. I have two point layers. One is of locations by lat/longs of homes in Louisiana. The other is a layer of ...
2
votes
1answer
48 views

Can I use areal mean pixel value in raster for input to Extract Values to Point tool

I have a dataset consisting of a point vector file (plant leaf area) overlaid and georeferenced to a raster file (soil moisture) that I want to use as inputs to the Extract Values To Point Tool in ...
0
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0answers
19 views

How do I subset a points dataset along roads so that every other point is selected?

I have a large dataset of about 5000 points. The points are currently all about 0.5 miles from one another. I want to subset these points so that I get every other point and the distance between ...
1
vote
1answer
57 views

How can I get the value of a point that falls between 2 points of another layer?

How can I get the value of a point that falls between 2 points of another layer? I have a Shapefile of points with values representing the distance from an origin (blue in the example bellow) at ...
0
votes
2answers
88 views

Point feature plots in wrong place in QGIS?

I am using QGIS 2.12 on Mac OS X Yosemite 10.10.5. I have a single point with given latitude and longitude. I want to create a new vector layer (shapefile) which will plot one point on the map ...
1
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1answer
116 views

2D point cloud to polygon

There was similar questions, but not exactly what I need, so I am asking here. Is there a way to create polygons from these points in the picture? >> The result I want to achieve in this picture >> ...
0
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0answers
71 views

How to calculate Spatial Autocorrelation of grouped points in ArcMap 10.2.2

I have 32 points uniformly distributed with 7 attributes that comprises continuous values. I used the Grouping Analysis tool in ArcMap 10.2.2. I set 2 groups that have clear differences and are also ...
0
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1answer
44 views

Adding Points to existing attributes [duplicate]

I have a table of 150 records which I was able to geocode except for 21 points. I'm able to manually geocode the rest of these 21 points. Every time I add the point, it creates a new row (which I know ...
2
votes
1answer
100 views

Combine digital elevation model (DEM) with point layer (QGIS)

I have two layers: The first one is a digital elevation model (DEM) as GeoTiff. The second is a point vector layer (start and end of street segments). What I want to do: Add elevation information ...
1
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1answer
24 views

Specifying rectangle symbol with height/length based on attributes values in mapfile?

I need to specify a rectangle symbol in a mapfile. The symbols should be of varying dimensions based on height/width values stored in a table's attributes. Is it possible to do something as with the ...
1
vote
1answer
28 views

inserting value from raster into overlaying point field

I am using ArcGIS 10.3 for Desktop. I am using an etopo bathymetry map and would like to determine the depth of ~50k points in another layer. I am sure there is a simple tool for this but I am ...
4
votes
1answer
133 views

Create uneven, different diameter ellipse around point in QGIS 2.10

I am trying to make an attribute to show the uneven spread of the crown of a tree using the four cardinal points. I can use a buffer to show one feature, in this case a root protection area. But I ...