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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0
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2answers
193 views

Summarizing data using ArcGIS for Desktop?

I am relatively new to GIS and am facing some difficulties trying to summarize/pool data together. I've attached the file to make it easier. FID_pc11_1 (Refers to postcode identifier) and count refers ...
5
votes
3answers
10k 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 ...
4
votes
2answers
3k views

How to collect data via WFS and Popup

I have a map with a WFS-Layer and I am able to add Polygons to my data stored in a PostGIS-database, served with Geoserver (Openlayers, Geoserver 2.1.4, PostGIS 2.0 for PostgreSQL 9.1).) How can I ...
10
votes
5answers
3k views

How to identify duplicate attributes in a field?

I have a point shapefile with thousand of points. It has an ID code field that supposed to be unique. Every now and then the data entry clerk wrongly type the id creating duplicates.Right now I'm ...
6
votes
2answers
255 views

How to enumerate join values with ArcGIS?

I have two shape files (e.g. postal code areas and cities) which I want to join based on an id that both shape files have in common (the id would be the city name in this example). Joining the two ...
1
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2answers
103 views

Getting attribute data from one dataset to another

In the image below you can see two shapefiles: NYC building footprints (outlined), and underneath a PLUTO shapefile rendered with a categorized blue gradient using the "Floor Number" column. The ...
20
votes
3answers
5k views

How to easily edit attribute data using Regular Expressions?

I am writing a tutorial for MSc students that uses QGIS. One of the tasks requires the attribute data to be modified (see pdf draft of tutorial here if interested ). The question is how to get them ...
6
votes
1answer
2k views

What is the best way to connect spatial data with attributes in Excel table?

I have many attributes which are stored in an Excel table. They refer to USA counties. I need to somehow connect those attributes to polygons in some format (don't know which is the best) and ...
6
votes
1answer
2k views

Can I change properties of several layers simultaneously?

I'm working on bulk data. I have a few hundred GeoTIFF images imported into a QGIS project, and I'd like to modify their layer properties - things like the no-data-value, transparency of certain pixel ...
10
votes
2answers
1k views

How to compute a new attribute based on changes in another attribute?

I am attempting to classify a set of gps time-encoded point data into behaviors based on different attributes. I have created an attribute that is 0 for home and 1 for away based on location, and now ...
6
votes
2answers
127 views

Clean up attributes

I want to clean up the attribute table of a road shapefile for all the entries in the fields. For example: As seen below I have a road feature with a "Name", Name From and Name To in the attribute ...
2
votes
1answer
358 views

Raster as Attribute Field Error

I'm using Arc 10.1. I am creating a parcel inventory where I would like to have a photo of the property attached as an attribute and view-able with an HTML popup. I have a polygon feature class built ...
7
votes
2answers
9k views

How do I change the data type in attribute table in QGIS

I have county data in which the FIPs (actually State FIPS and County FIPS combined). I have data imported as CSV with the sames FIPS data titled STCounty. However, the shapefile FIPS is listed as a ...
3
votes
1answer
4k 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
105 views

Build raster with multiple attributes based on 3 input rasters

I am trying to make a new raster based on three input rasters which have the same cell size and the grids align perfectly. I now want to construct a new raster, which for each cell, has three ...
1
vote
1answer
45 views

Adding data from a table to a grid in ArcGIS

I have a table with 720 rows and 156 columns. I have a grid with 720 rows and 156 columns. I would like to assign the values from the table to the corresponding values in the grid. I am a beginner to ...
1
vote
2answers
5k views

OpenLayers Select a feature from attribute or id

Using Openlayers.....Is it possible to select a feature on a map by an attribute? eg: Select a feature from a dropdown menu populated with the feature "id" or a table field attribute values.
0
votes
1answer
39 views

Copying attributes of one row to another row in polygon shapefile in ArcGIS?

I have a single polygon shape file in ArcMap with 25*25m grids, and I want to assign the attribute values of a single grid/polygon to another one close by i.e. copy attributes from a row to another ...
0
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3answers
947 views

KML attribute data on onload of html page using openlayers

How to get KML attribute data on onload of html page using openlayers. This is kml file: click here to get kml file Any help is appreciated. Thanks in advance.
5
votes
1answer
799 views

How to programmatically associate a layer with a custom UI?

I know it is possible to associate a layer with a custom UI for editing feature attributes using the QGIS interface. But is this possible with Python? This link shows how to achieve the result ...
4
votes
1answer
1k views

How to add CSV data with no coordinates to a polygon layer in QGIS?

I would like to add attributes from an spss database (around 300 cases) to a polygon layer in QGIS. Both datasets have a column with unique IDs. I exported the spss data to a CSV file which does not ...
3
votes
1answer
226 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 ...
3
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0answers
3k views

How to edit Attributes on WFS Layer through Popup?

I am working on a project for university. So far I have displayed WfsLayers which can be select from a panel, also I can click on my points whereupon a Popup will show up with some information which ...
2
votes
2answers
269 views

Auto populate field as concatenation of other fields

I'm searching for a way to automatically combine several field values entered in the feature edit dialogue, resulting in a new column comprised of the former values. I have, say fields A, B and C ...
2
votes
2answers
150 views

Why OSM data has different attribute values from the same element and same time frame?

Here is my question: Does anyone know why OSM has different attribute values from the same element and same frame time? The example explains itself, when I try the Shapefile from different mirrors ...
2
votes
1answer
65 views

Compare features in PostGIS with updating attributes

I have two polygonal layers: "existing" and "modified". Attribute table of "existing" and "modified" layers have same column "feature_id" - number of feature. Please help me create query which write ...
6
votes
2answers
156 views

What event is fired when a feature is edited?

When the user draws a new feature (line, point, etc.) in ArcMap, there are null attributes. If the user enters values in these null fields what is the event that is fired? I want to control the ...
3
votes
1answer
93 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 ...
3
votes
1answer
228 views

Field Value Mapping QGIS

I am wondering if there is a way to do field value maps that are filtered based on another attribute field? I know how to associate value maps, but not that are connected to another field. I have ...
3
votes
3answers
1k views

openlayers attribute substitution failing on kml file

I'm trying to read in mile markers for a marathon from a .kml file and use the MILE attribute to set the label. My layer code looks like this: // add layer mile_markers_layer = new ...
2
votes
2answers
125 views

How can I select features based on another feature attributes?

Here is my case: I have a layer of features (buildings from a city) that is populated with polygons. This polygons have attributes : street name and postal code In the project I have another layer of ...
2
votes
1answer
2k 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. I save it as .dxf. The contours don't have any attributes or data. That's bad, because I want to make a 3D landscape in Revit ...
2
votes
2answers
1k views

Merge lines with the same 'name' attribute on QGIS?

I have a shapefile with a few thousand lines, each is a street segment. I'd like to merge all features with the same 'streetName' attribute into a single attribute. I only really care about the name ...
2
votes
0answers
193 views

Assign Sink ID to upstream features in a geometric network

Looking for a way to automatically assign an 8-character Sink ID to every upstream feature in a geometric network. There are over 500 sinks and about 5000 points and lines upstream from those sinks. ...
2
votes
2answers
2k views

How to access attribute data type in QGIS?

I've been developing a plugin on QGIS platform using PyQGIS. So far plugin does the following: You can select any feature of the already loaded vector layer in QGIS. After selection, plugin displays ...
1
vote
0answers
38 views

How to implement 3NF (third normal form) in ArcGIS attribute tables? [closed]

How can I implement 3NF (third normal form) in ArcGIS attribute tables? I have a field what have redundant values, and I need to run different functions for these redundant datas, so I need to place ...
1
vote
1answer
182 views

Assigning field value based on location without join

I'm interested in updating a field in geodatabase feature classes based on their location in relation to another feature class in the geodatabase, but without having to perform a join (and therefore ...
1
vote
1answer
265 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 ...
1
vote
1answer
422 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 ...
1
vote
0answers
109 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 ...
1
vote
1answer
369 views

Connect not working for custom QGIS form

So I have a custom form for editting feature attributes. However, I can't seem to correctly disconnect and reconnect certain bindings. The init code is below and should work for any simple QT widget ...
1
vote
1answer
126 views

Stop custom attribute form from resizing in Qgis

When I open a custom attribute form for a feature in Qgis it always gets resized to the default size of the original Qgis attribute form. I've tried to set the sizePolicy in QT Designer to Fixed ...
1
vote
2answers
140 views

Generating new shp files according to attribute in QGIS

I know that it is possible to color a vector map by attribute. I separated a map into 4 colors based on an attribute and now I want to generate a new map for each color. Is there a way to do this in ...
1
vote
1answer
1k views

To get FeatureInfo in OpenLayers

I am new to OpenLayers and I want to add OpenLayers.Control.WMSGetFeatureInfo to get feature info to website.But i can't figure out right method. I also see the source code of GeoServer OpenLayers ...
0
votes
1answer
53 views

Compare Multiple attributes visually

I am working on a project in which I want to take point features( tweets) and compare them to the GDP per capita of countries. I would like to have my end result be such as the following: GDP Class ...
0
votes
1answer
38 views

Generate Service Area Polygons with Field(s) Added

Does anyone know of a way to generate service area polygons which, when created, maintain a field from the feature class from which the polygons are generated? For example, if I am generating a ...
0
votes
2answers
61 views

Exporting layers from ArcGIS into PostGIS while preserving attributes such as color

I have managed to import/convert a KML into ArcGIS 10.0 (ArcMap) using the built-in conversion tools and now have a series of layers. Next, I export these layers to a PostGIS database using the ...
0
votes
1answer
97 views

Feature attributes won't update

I am trying to update feature attributes from a .NET application that I'm working on. I've cleaned the code down to the following example: string serviceUrl = ...
0
votes
0answers
116 views

ArcGIS Online is time/date stamping edits with GMT time, and not CST time. Is there a way to fix this?

We are currently using ArcGIS Online with ArcMap 10.0 . When someone edits a field in the Online Map it will time/date stamp the last edited attribute fields with the current date and time, currently ...
0
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0answers
229 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 ...