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

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2
votes
2answers
86 views

Extending line by adding point at end of it using QGIS?

I'm using QGIS 2.8 to modify a line. I need to add a point on one end of this line, and then move this new point further away, leaving the original end point in the same place. I can manage to create ...
3
votes
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
votes
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 ...
2
votes
1answer
104 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 ...
0
votes
2answers
92 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
vote
2answers
550 views

Distance between points along polyline ArcGIS for Desktop?

I'm using ArcGIS 10.3 (Desktop), and I'm trying to measure the distance between points following a path determined by a set of polylines. Hand measurement is not a viable option-- there are ~7500 ...
1
vote
2answers
260 views

Points on Map overlapping/covering city and town names

I have a map with many points, these points map incidences of landmine accidents in Colombia. There are thousands of points and cover up parts of city and town names, in some cases the entire lables ...
4
votes
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
votes
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 ...
2
votes
0answers
35 views

Create polygon layer from point data with number attribute where polygon encloses n% of point data attribute value in QGIS [closed]

I have two sets of data, one is the CodePoint Open with the location of all of the uk postcodes, the second is from online form data from which I've extracted the postcode and telephone area code, and ...
1
vote
1answer
58 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 ...
8
votes
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 ...
4
votes
2answers
98 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 ...
6
votes
2answers
918 views

How to create zip code areas from point data?

I have a point dataset which has zipcodes for a certain region. This zipcodes have been marked on the basis of lat long collected. So each zipcode is repeated as it would be useful to show the region ...
1
vote
1answer
93 views

Get all points with in some range of a point (or range of point) in MySQL

I have got a list of points and a fixed range (10m). So what I have to do is for each point I have to find all the points present in a table with the 10m range of the given point. For example: Let ...
3
votes
2answers
385 views

gDistance to determine closest point to polygon: does changing projection change results qualitatively?

I'm using gDistance from the rgeos package for R to find the nearest point to a polygon. The projection of both points and the polygon is +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 ...
0
votes
0answers
238 views

PyQgis: How can I preserve order or index when adding features to a Vector Layer from a file?

As I read data from a text file and add points to a QgsVectorLayer (as well as related attributes), each new record gets 'stacked' on top of the previous one in the Attribute Table (and within the ...
2
votes
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 ...
0
votes
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 ...
3
votes
3answers
389 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 ...
10
votes
4answers
9k views

Get all the points of a polyline

I have some polyline feature objects in python. Now I want to get all the points of polylines. For example, if a polyline has start point [0,0] end point [5,5]. Result: ...
4
votes
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 ...
9
votes
1answer
229 views

Point sampling along a pole-wrapping coastline with PostGIS

I am working on a task that requires me to get sample points every 1000 km along coastlines, and have run into a problem with Antarctica. From what I can tell, it seems to be an issue with the use of ...
3
votes
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 ...
2
votes
2answers
3k views

Layers with same coordinates not lining up

I have a project where I have a few layers (State of Texas, cities, roads, etc.). They are all resaved and projected to NAD83 / UTM zone 14N EPSG: 26914. The project CRS is also NAD83 / UTM zone 14N ...
3
votes
1answer
97 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
votes
1answer
382 views

Choosing Point to Raster vs Feature to Raster in ArcGIS for Desktop?

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 ...
5
votes
5answers
11k views

Creating line between two points with common field?

Does anyone know how I could create a line between two points that have a common code? For example: I have the start and end point of a pipe as a lat/long for a network of pipes, each with a ...
-2
votes
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 ...
0
votes
0answers
84 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 ...
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 ...
1
vote
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 ...
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
votes
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?
1
vote
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
vote
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 ...
1
vote
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 ...
2
votes
2answers
92 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
vote
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 ...
3
votes
2answers
126 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 ...
0
votes
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
votes
1answer
104 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 ...
4
votes
1answer
291 views

Calculating attribute for network distance between multiple points in ArcGIS Desktop?

There is a road network and two point feature classes. For one feature class, I need to calculate a field to hold road (not Euclidean!) distance from every point to a certain point in the other ...
0
votes
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
146 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 ...
1
vote
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 ...
1
vote
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
vote
1answer
295 views

Display different symbols in QGIS using Point Displacement renderer

How to display different symbols (not different in size, different in shape and color) on the same point in QGIS 2.8 using Point Displacement renderer? I want my layout with symbols around the ...
2
votes
2answers
73 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. ...