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

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2answers
12 views

Creating 3D line features based on 3D point features

Is it possible, in ArcGIS, to create a 3D line feature by connecting 3D point features? The version is ArcGIS 10.0, in case this helps.
4
votes
4answers
86 views

How do I fill in serial letters (AA, AB,AC…,BA,BB,BC…ZZ) to a shape?

(I am using ArcGIS software, ArcMap...) MY PROBLEM I have a shape file containing points. The shape file contains 3 columns named FID, Shape* and Label. In the column I want to fill in AA, AB, ...
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votes
1answer
45 views

QGIS and Python - create line with multiple points in postgis

How can I create a line, with Python functions, with many points that are records in Postgis? Thank you
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0answers
27 views

Assuming nearest point for a region

I'm mapping agricultural cropping systems in Brazil using QGIS. From satellite images I got an raster file with 5136 x 5136 pixels from my field work. Now I need to associate many soil/climate ...
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0answers
35 views

Creating a 3D line feature based on 3D point features

In ArcGIS, is it possible to create a 3D line feature by drawing a line that connects 3D point features?
1
vote
1answer
25 views

generate random world point geometries

I have a world map. I need random point geometry. So, how can I randomly generate point coordinates? Any programming language. Also, I am using SRID 4326. Any programming language.
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2answers
46 views

Joining Points and Polygons

I am new at using arcGIS 9.3.1 and am having trouble joining data. I have a shapefile of census tract polygons and a separate file of points that are crimes in Chicago in 2010. The crime points were ...
1
vote
1answer
45 views

random sampling from spatial points in R

Can anyone help me out on the best package to sample from a spatial point dataset? My dataset consists of a list of positions inside a region, and for each point I also have the name/number of the ...
1
vote
2answers
38 views

simplify point geometry

I have a great amount of points and I need to show them on map. I am using OpenLayers. Is it possible to simplify point geometry in order to speed up the process of rendering?
2
votes
0answers
62 views

Problems converting polygon to point

I'm trying to convert polygons to points with ArcGIS 10. My polygon layer has 2 attributes that I want to give to my point layer. I'm using the Feature to Point function from the Arctoolbox, but it ...
0
votes
1answer
68 views

Aggregate points with same values to polygons

I have a shapefile with 2M measurement points (each measurement point has a resolution of a 1/10). How can I aggregate points around each other if and create polygons out of it? They do not have to ...
-4
votes
0answers
59 views

Re-referencing points [closed]

Hello I wanted to know how to re-reference points. I currently have points that are referenced to a coordinate system and the map is set to the same coordinate system. But the actual points are not ...
0
votes
0answers
28 views

How to add vertices to existing linestrings in mysql?

Is it possible to add a Point at the end of a Linestring in MySql? For example I have a Linestring as Linestring(1 2, 1 4, 1 6) and I want to add a Point Point(1 7) at the end (output should ...
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vote
0answers
75 views

How to calculate average value within a polygon(in Qgis with Python)?

Now I have a point and polygon shapefile and I want to calculate the points' average value within each polygons How to do it with python? I tried to find out but google gives me a lot of raster ...
1
vote
0answers
36 views

Join .csv file and .shp of georeferenced points

I have georeferenced a map and saved a selection of some points on the map. These points are cities of departure and arrival and I want to join the .shp with a and excel .csv with the information of ...

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