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3
votes
1answer
71 views

How to add an ID based on attributes in ArcMap 10.1

Given are: a polygon shapefile/feature class (FC) containing municipal districts a point shapefile/FC containing locations of, lets say, trees. My goal is to append an unique value (1, 2, 3, ...) ...
2
votes
4answers
104 views

Best way to 'join' polygons

I'm looking for the best ways to 'group' a budge of block polygons in a new polygon that should be the town. My block layer is something like this: Or zoomed: And I'm looking to get something ...
1
vote
0answers
41 views

Geoprocessing Ungroups Layers

Is there a fix for this, am I only imagining this, or is it a bug: ArcMAP 10.1 for Desktop Build 3035 on a 64 bit Windows 7 system When I run a geoprocessing task that modifies the input data (such ...
0
votes
1answer
29 views

Wrong output wth group by and aggregate function in spatialite

I have a grid and for every cell I want to set the column "landuse" according to the largest intersecting polygon. SELECT grid.PKUID, landuse.landuse, ...
15
votes
5answers
187 views

How to start a local GIS Users Group

My immediate geographic area is lacking an organized local GIS Users Group. I belong to a group that meets a couple times a year, but its about 1.5 hour drive. I'm thinking about starting up a Users ...
3
votes
2answers
227 views

How to group and count attribute data?

I have a problem with group same data to count it. for example, i want to group same code to one and count them. i can do it when i use MapInfo (Pic 1) but i can't in QGIS. (Pic 2: i can classify ...
0
votes
0answers
61 views

group all layer index file after adding to TOC

I have added all the tif file of shape file to the map (Desktop).what i need to do group all tif file as one layer to TOC.How to do? Please help me.I am using c#.net
2
votes
2answers
252 views

GROUP BY clause in the UpdateCursor arcpy.da

I need to specify a "group by" clause for UpdateCursor arcpy.da. From here I found out that it's possible to do using an optional pair of SQL prefix and postfix. But there are no examples and I'm ...
2
votes
2answers
306 views

Help with Python and adding a grouplayer to arc, renaming it from a folder name, then adding layers to it from that folder

I am trying to use os.walk to go through a directory tree, pull out all the .shp files in it, create a grouplayer in the mxd, rename the grouplayer the folder name, then add the layers from that ...
0
votes
0answers
93 views

How to draw polygons around known clusters

I need to split up an area into non-overlapping, but contiguous territories. I have n points on a map, which are partitioned into k sets. The partition is only partially geographic, meaning that ...
0
votes
0answers
35 views

Generate Adjacency Table from a Region Grouped Raster Layer

I’ve searched high and low to no avail looking for any existing tools, scripts, ArcGIS geoprocessing steps that will output an adjacency table something like this: VALUE,ADJ_VALUE,LENGTH_EDGE (m) ...
3
votes
2answers
771 views

group by timestamp interval 10 minutes postgresql

I need some help on this: I need to group by a period of time spliting up by 10 minutes: I have this query below that returns me a result set SELECT timestamp FROM table_1, ...
2
votes
1answer
243 views

field calculation in arcgis

i have a data which contain a code of area an value of area in shapefile, ex.: area|value 1|33 1|43 1|31 2|12 2|43 3|66 3|76 the question is how to calculate total value per area with arcgis, i ...
4
votes
0answers
222 views

How to Perform a Grouping Analysis of Points to Divide a Polygon into n Number of Sub-Regions?

I'm attempting to create n sub-regions from a polygon based on a cluster analysis of a bunch of overlapping raster layers (physical layers, eg. depth, currents, waves...). Briefly, I can create a ...
2
votes
3answers
612 views

get layer names from a group within a group

Trying to get the layer names from a group that are inside a group. I have the code the gets the layer from a group, but not group inside group. any ideas? Dim pDoc As IMxDocument Set pDoc = ...
5
votes
2answers
168 views

Grouping lines together to form one line after a distance threshold is met: ArcGIS 10

I have lines on a map showing the most direct way from point data to the coastline (polygon). I would like to group the lines if they are close to each other by a distance that I can set. Where the ...
4
votes
2answers
660 views

How to copy a group of layers between QGIS projects?

In ArcGIS I am used to being able to have a couple of MXD documents open and copy-paste groups of layers from one MXD's table of contents to another. This can save a LOT of time ensuring consistent ...