A characteristic of an object (person, thing, etc.). In the GIS field, it is used to refer to the non-spatial data associated with a location or geometry

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24 views

How to split a polygon by a polygon and apportion attributes - postgis

I would like to split polygons by polygons and have the numerical attributes be apportioned. For example: I have a parcel that needs to be split by region. With How to split polygons with another ...
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2answers
9 views

Adding time stamps to animation slides with OSS tools

I would like to create an animation with time lapse values printed on the PNG file. For this purpose I have created in QGIS a vector layer that stores timestamp and temperature value pairs for various ...
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0answers
32 views

Problem reducing the width of the attributes fields of a shapefile using python

I have a shapefile with rather long attribute widths (which is resulting in a rather large file). I am trying to trim it in python, here is my code: layer = qgis.utils.iface.activeLayer() ...
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0answers
37 views

How to create a many to one spatial join?

I have a polygon feature class of territories and a point feature class of trees. The points have many attributes, one of them is the tree species name. I need to get the list of all the tree species ...
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1answer
21 views

Expression to create and populate column based on filtered fields

I wanted to create a column and populate it with data based on data from other fields. If column_1 contains fields which has similar string (eg. field_1 = "Country: UK", field_2 = "Country: US", ...
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1answer
26 views

Select by attributes within the fiona Python module

Is it possible to select polygons from a shapefile based upon their attributes using the Fiona Python module? I can't seem to find anything in the docs, but it seems like a strange thing not to be ...
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1answer
52 views

Adding attribute list to combobox in a python plugin

I am developing a simple plugin at the moment which contains 3 combo boxes: comboBox_1 comboBox_2 comboBox_3 Combobox 1 & 2 lists the vector layers available, however I would like the 3rd ...
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0answers
32 views

Why can't I save a line shapefile?

I'm working with qgis v. 2.0.1. I have some data points and I just wanted to create a new shapefile with line geometry. In the new vectorlayer-window, I added some attributes (approx. 10) and klicked ...
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0answers
28 views

how to easily serve vector layer with extra attributes for openlayers

On a website I'd like to show an openstreetmap with buildings colored by a certain feature (tag). So far I was able to extract the buildings for a bounding box, save them as an osm file and load it ...
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1answer
53 views

How can I copy columns from layer 1 to layer 2?

I have two layers, the first layer is pipe: that has some fields (column) title like : length, id, material. Also I have another layer that is empty (without any fields). How can I copy fields ...
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0answers
21 views

How to update attribute table of a shapefile on display automatically? [duplicate]

I have a shapefile attribute table on display. After some processing, I have to right click click Refresh to get updated version of table. I am wondering if there is a way using arcpy to update it ...
0
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1answer
41 views

Programmatically modify attributes for vector layer in QGIS

I am trying to programmatically modify attributes for a vector layer, using calculated values currently stocked in a dictionary. Any pointers on where i'm going wrong? my dictionary has the feature ...
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0answers
19 views

Is there a method to add attribute weights to a network analysis?

I would like to use demographic attributes of a census tract centroid as a weight for a closest facility analysis. My tract centroids are incidents in the analysis while medical centers are ...
2
votes
1answer
55 views

How can one read the response of a GetFeature request with Openlayers?

I am using Openlayers to send a GetFeature request to Geoserver. With the help of Firebug I can see that the response contains some of the attribute data I need. I am interested in showing some ...
3
votes
1answer
65 views

Batch map creation, iterated over attributes of a layer, in QGIS

I am using QGIS 2.0.1 under Mac OS-X 10.8.2. I have a layer of counties in New Mexico to which I have joined a csv file that includes presence / absence of plant species by county. I've set up the ...
2
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3answers
58 views

Display multiple attributes for one point

I am using ArcGIS 10. How can I display multiple attributes for a single point. For example, I would like to display (graphically if possible) the amenities provided at various recreational areas... ...
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0answers
26 views

QGIS grabs incorrect field values for categorized style classification

as seen in the first image, the field values QGIS returns when I attempt a 'select by expression' are values found nowhere in the field in question ('FLD_ZONE'). Instead, it returns a selection of ...
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1answer
66 views

How can I get clean road attributes from OSM data?

I would like to use osm road data for a project where I need to broadly distinguish between primary, secondary, and tertiary roads. OSM data seems just fine to work with Arcgis' Network Analyst. ...
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1answer
50 views

Attribute names being truncated during extraction

I have 30-40 raster layers and each raster has approximately 40 columns. The attribute/column names are very long, and the beginning of each column name is the same. During the extraction process, ...
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1answer
63 views

Split an attribute Python 9.3 in modelbuilder expression? [closed]

Updated question Goal: I need to upgrade an existing Model-builder were the expressions uses Python 9.3. Workproces & Goal: My *.mxd Have 1 attribute field containing the following build: ...
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1answer
195 views

How to export QGIS contour attributes in a DXF file?

I'm new to this. I have a .tiff data file that generates contours in QGis. That's super. I save it as .dxf. The contours don't have any attributes or data. That's bad, because I want to make a 3D ...
0
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1answer
43 views

Using attributes of a polygon in one layer to identify polygons in another

So I'm in the process of developing a web application, I am using open source tools so qgis, postgis, play framework for the web app. And I have come across an interesting problem that I'm trying to ...
2
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0answers
43 views

Save WFS layers multiple records with geoext editor grid

How can I save multiple records after modification with geoext editor grid? The saving is working fine if I modify only one of the records, but it fails when I try to save multiple modifications. I ...
2
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1answer
111 views

FME - How to write all attributes when multiple source files have the same name?

I am using FME to write all the MapInfo TAB files in a directory and it's subdirectories to a File Geodatabase. I'm using dynamic readers and dynamic writers as I don't know the geometry or schema of ...
3
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3answers
172 views

FME - How to add an attribute when schema definition is dynamic?

I have an FME workspace which reads a folder of MapInfo TAB files and writes them to a File Geodatabase. The reader and writers are both using dynamic schema as I need to run this workbench on ...
3
votes
1answer
34 views

Input field not showing up in Distance Matrix In QGIS 2.0

I tried to perform a Distance Matrix analysis of building centroids. I have a two building centroid layers. The attributes in both the tables are name, osm_id, perimeter and area. In the Distance ...
5
votes
1answer
70 views

How can I get the field index of the new layer in my script using Python?

I am trying to use layer.changeAttributeValue(fid, fieldIndex, value) to add values to a field in QGIS Basically, I'm creating a plugin which will, if a checkbox is ticked, create a new field, then ...
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1answer
35 views

How to Add Field Between Two Existing Field in Shapefile

Can you please let me know if it is possible to add a new Field between two existing field using ArcPy? For Example if I have "Name", "Area", fiels already in my shapefile can I add a new field called ...
2
votes
1answer
112 views

Automatic calculation in one attribute table based on values in another attribute table using python

I am trying to fill the fields of one gdb table based on some statistics over the attributes of another shape file. As it was not possible in ARCgis directly, I am trying to use python coe for this ...
1
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1answer
85 views

selection by attributes with python

I have a problem concerning the selection by attribute with python on arcmap. I use this code: import arcpy from arcpy import env arcpy.env.workspace= "E:\cities" Mi=(r"E:\cities\rivers.shp") rows = ...
0
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0answers
61 views

How to change Split Vector by Attribute to produce files with attribute values as file names?

Using: QGIS 2.0.1 I am trying to separate a large fauna point .shp file into many shapefiles based on each species' unique name attribute (i.e. by "SCI_NAME" field)??? I am currently using "Split ...
1
vote
1answer
78 views

Join Tables related by a composite primary key in qgis

I have two tables, one has the geometry and other has attributes. The table with geometry has unique number primary key, and 4 columns admin1,admin2,admin3,featureid. Table two is a csv file has the ...
0
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1answer
43 views

Split by attribute automatically on several layers in QGIS

I need to do a 2 stage split by attribute, using QGIS 2.0.1-Dufour. After the first split, I got 30 layers. Is there any way to do the second split automatically? I don't really like the idea to make ...
0
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0answers
51 views

kml to shp including a field attribute as name/description (using 2.1.0 Durfour)

I have the Durfour version at my disposal. I captured some data in Google Earth, converted it to .shp, made some revision (e.g. added consecutive numbering) and would like to convert it back into ...
2
votes
0answers
53 views

Can I use a cursor to select two rows and compare attributes

Can I use the cursor search function to look at the first two rows in a table and select them so I can compare attributes and possibly merge them or change attributes? I am using ArcGIS 10.0
3
votes
1answer
52 views

New attribute creation using ogr and regex

I've got a folder full of dxf files with elevation values included as part of a long text attribute. I've written a regex expression to extract the elevation value, and would like to add it as a new ...
1
vote
1answer
114 views

How I can insert feature attribute after feature drawing complete

I am new to OpenLayers. I am trying to insert wfs feature information to my map after drawing like this. I can draw a WFS feature like (polygon, line, point) on map and after drawing the feature ...
0
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0answers
94 views

Show live attribute when hover in a map

i'm still new in openlayers. i would like to show "location" attribute on right corner of the map when hover in map. my map consist of of many attributes and one of them is location. how can i ...
3
votes
1answer
426 views

Why can't I edit attribute table imported through 'text as layer'

I imported the coordinates from an Excel table. They show as single points as intended. Now I want to add columns to the attribute table, but I'm not able to edit it. I wanted to import the following ...
2
votes
1answer
885 views

How to rename attribute's name of a field in a shape file attribute table?

I would like to rename some fields in my attribute table: Like rename XRF_N3in something else. It seems quite a easy issue but I don't find any information about how can I do that... I've QGIS 1.8 ...
0
votes
0answers
64 views

Get Features From GeoServer Server Using Attribute

Can anyone explain how to query features from GeoServer into an OpenLayers map using an attribute value? Here is what I need to do; 1) A user enters a number or multiple numbers for polygons they ...
2
votes
0answers
48 views

How to copy the contents of an attribute from one vector layer to another one that touches it or intersects it?

I have 2 layers that intersect, called layer A and layer B. Layer A has an attribute (X) that I want to copy wholesale (for the whole layer) to layer B, so that when object A1 intersects object B1, ...
0
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1answer
71 views

Access attributes on featureCollection

The geoJSON-String: { "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": {"title": "Standort 1 "}, "geometry": { "type": "Point", ...
0
votes
1answer
133 views

How to transfer attribute of nearest Point to Line feature?

Feature class 1: Addresses (Point) Feature class 2: Road centerlines (Polyline) Which is the most appropriate tool for transferring the Address attribute (e.g. Road No. or Bldg) to the nearest Road ...
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vote
2answers
760 views

How to Merge/Dissolve Polygons By Common Attribute Field in QGIS?

I have joined corresponding Local Enterprise Partnerships table data into a polygon shape file containing UK Local Authorities. How do I Dissolve or Merge the the Local Authorities polygons by ...
1
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0answers
47 views

Network Analyst: How to sum cost attributes without length with closest facility tool

I am working on Safe Routes to School, and have created a network dataset. Each segment of the newtork has a 'walk_score' assinged (0,1,3,5,10), based upon street classification and sidwalk ...
0
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1answer
164 views

access attribute values in openlayers rule

I have a webgis where i use openlayers and i'm trying to make a FOR loop to generate a series of rules for my POI layer. I have tried just like that: http://pastebin.com/CTuiWd4V My problem is that ...
2
votes
0answers
30 views

Generating composite values ( MAPFID numbers) for previously duplicated vales based on 2 different fields

Good day everyone! I have lurked around here for info preiously, but this is my first post, so please be gentle if I commit any faux pas. Okay, let me try to break this down so we can all ...
1
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2answers
222 views

Join excel attributes to shape attribute

I am wondering if there is a way to join the attributes from excel tables to shapes in Qgis. I have abbreviations in the shape and want to add the associated complete names from excel file by ...
0
votes
1answer
85 views

Calculate attribute height of point data

I have an x (easting), y (northing) and z (height) values associated with my point shapefile. I would like to calculate the z values from the DTM I have - how do I do this in QGIS? I am fairly new ...