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
16
votes
3answers
806 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 ...
10
votes
2answers
525 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 ...
8
votes
4answers
588 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 ...
7
votes
2answers
243 views
OpenLayers how to maintain layer ordering while using SelectFeature control
I'd like my map to display a few layers in a particular order. Some of these layers are Vectors, others are XYZs, and some of my Vector layers display attribution.
Initial layer ordering works fine ...
6
votes
4answers
415 views
Calculate polygon field based on neigboring polygon attribute
I have a vector shape with many different sized polygons each possessing an own class name (for instance "houses", "houses with offices", etc ...)
I want to assign a new field to each polygon ...
6
votes
2answers
99 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 ...
6
votes
1answer
159 views
Add polygons to existing shapefile in QGIS
I'm completely new to GIS and this is a very basic question about editing existing shapefiles.
I am working off an existing shapefile which was digitized (by a colleague) so that polygons represent ...
5
votes
3answers
643 views
FME: Join attributes in text file with attributes in SHAPE file
I have a SHAPE file with points and different attributes - one attribute MyID. I also have a plain text file with several attributes - each in a separated column:
MyID MyValue
1 A
2 B
3 C
...
5
votes
2answers
68 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 ...
5
votes
2answers
381 views
Importing attributes from Excel file into new Polygons
I have a constantly updated Excel file containing address information which I am currently copying into the attributes of new polygons which I am creating on a daily basis. I am currently doing this ...
4
votes
1answer
237 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 ...
4
votes
2answers
707 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 ...
3
votes
1answer
328 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 ...
3
votes
1answer
144 views
Calculate attributes to table based on other attributes
I am going through thousands and thousands of road lines and giving them a value based on QC with imagery. So for instance for the add_data field I give it one of these four numbers
0 = not examined
...
3
votes
2answers
1k 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
36 views
Is it possible to use UTF-8 characters for shapefile attributes?
I heard that according to a specification shapefile attributes stored in dbf-files cannot have UTF-8 as encoding.
And then I found out that an additional file with the ending CPG can be used to define ...
3
votes
1answer
103 views
How do I find overlapping attributes in two different layers?
I have two layers - one with country borders, and one with river basin borders - and I need to find a way to generate a list of basins that occur in each country. Is there a way to find overlapping ...
3
votes
1answer
300 views
Changing attribute data types using PyQGIS
OK, so I've already asked a question how to access attribute data types when developing plugin for QGIS, using PyQGIS. And one helpful member said i should use pendingFields() method on the current ...
3
votes
1answer
480 views
ArcGIS 10 - Raster cell values and raster attribute tables - reassign raster cell values from another attribute
It seems like this should be relatively easy to accomplish, but I've been messing with this issue off and on for a couple days and have not successfully figured it out.
Problem: I have a large (size ...
3
votes
0answers
116 views
Edit Widget Add attachments only shows when is made, not when making
So i post my question here because it didnt recieved any answers on Stackoverflow.
Hello i have some difficulties,
Let me see what i want to do with some pictures and code:
I want to add some ...
3
votes
0answers
44 views
Are there any common field names for the FGDC street address standard fields?
I have been looking into implementing the FGDC street address data standards so that my address data is potentially consistent with other US data I obtain in the future. However, the FGDC ...
3
votes
0answers
55 views
Passing attributes to neighbouring polygons
I have an ecosystem polygon layer that has been updated using a more recent tree cover layer (to remove cleared areas and also to re-align veg boundaries where growth has occured).
Where the polygons ...
2
votes
3answers
225 views
Spatial join including attributes - kind of like right join
I've run in to a little problem. I have two sets of polygons with important attributes. I need to join over the attributes from the first set to the other, but I can't seem to figure out how. ...
2
votes
2answers
105 views
What specifically is an 'attribute' and how does it work with the related chart?
I'm a new QGIS user (and GIS technology in general) and I'm trying to learn its fundamental features. I have a big dilemma about vector shapefiles, and points in particular: basically, I don't ...
2
votes
2answers
787 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 ...
2
votes
3answers
201 views
Joining attributes of polygons and points by location in QGIS
I have two shapefiles....
points containing a number field 'response_time'
a polygon grid of square polygons containing fields including 'PNTCNT' with the number of points per polygon, calculated ...
2
votes
2answers
77 views
Capitalizing The First Letter Of Each Word In Attribute Field
Does anyone know of a way to capitalize the first letter of each word in a field in an attribute table? I am doing this in QGIS. I know of field calculations to change all the words to Lower or ...
2
votes
2answers
120 views
pass string varialbe to placeholder for attribute in infoWindow (ArcGIS Javascript)
I am working on a Javascript-based webapp that uses an ArcGIS map service, which has several attribute columns containing URLs to photos. The user will be able to open photos by clicking on a link in ...
2
votes
3answers
646 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
1answer
119 views
How to view attribute table in layer within ArcGIS Server map service?
I'm new to ArcGIS Server and am trying to publish layers within an mxd to ArcGIS Server. When I bring the published map service back into Arc there is no Open Attribute Table option although I am able ...
2
votes
1answer
443 views
Identify duplicate polygons to enable removal after reviewing attributes
I wish to label overlapping polygons so that I can manually locate each overlap then review the attributes of each overlapping polygon and decide which suite of attributes to maintain before ...
2
votes
1answer
22 views
Near analysis by matching attribute in two different layers
I need to perform a near analysis to assign cases in one feature class to their nearest match on an attribute in a different feature class (ex: Tutors and Tutees need to be paired by same language ...
2
votes
1answer
43 views
Merge attribute data using spatial query in QGIS
I have 2 vector layers that I wish to correlate attributes - a shape file containing boundary polygons and a shape file containing point locations.
I'm using the vector>spatial query tool to generate ...
2
votes
2answers
187 views
ArcSDE: Specifying fields to not allow null values
I have a feature class in SDE that has various fields where the setting AllowNulls is set to FALSE.
When creating a feature in ArcMap in this feature class it still allows nulls to be specified in ...
2
votes
1answer
42 views
Displaying raster attributes on data driven pages
I have a feature class of 50 properties that are ranked. I have a photo for each property stored in a raster attribute column (in the feature class) called "Picture". I am trying to create a Dynamic ...
2
votes
1answer
41 views
How to make a certain attribute Toggelable? [duplicate]
I have imported data from an excel spreadsheet containing lat,long coordinates associated with other attributes such as current operator of each point (well). I imported as a tab delimited file, then ...
2
votes
1answer
259 views
How to write XML attributes from feature with ArcView license?
I need to generate xml of attribute data of a feature, but I have only Arcview license so, I can't use Export XML tool. What are my options?
What is wrong with this code (after applying search ...
2
votes
1answer
513 views
FME: No attributes exported when writing to SHAPE file
Setup:
I have some input data (SHAPE) which I use a Clipper transformer on. Depending on the result of the Clipper, I assign a value to an attribute. In the end I assign the two results/streams to a ...
2
votes
0answers
77 views
How to create a custom Attribute Inspector for mobile app using the ESRI JS API
I am making a mobile version of a JS web application I developed. I'm noticing though that the AttributeInspector widget by default uses standard dojo/form controls. This means that the form within ...
2
votes
0answers
729 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 ...
1
vote
1answer
134 views
How do you parse an HTML formatted attribute value to seperate columns in a database table?
All,
I have an attribute field formatted using HTML all ready to go for google earth markers.
The KML in question is here:
http://dl.dropbox.com/u/95231813/state_pts_MI.kml
Here is the value:
...
1
vote
1answer
440 views
Join attribute table
I am using QGIS 1.7.3 on Mac and when I try to use the tool "join" in the properties toolbox, I have no possibility to add a name for either the file or the field used to join tables.
Has anyone ...
1
vote
1answer
703 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 ...
1
vote
3answers
244 views
Deleting columns from joined attribute table in QGIS
After joining the attribute tables from two layers, I have a lot of duplicate columns on my table, making it hard to read.
However, even when in "edit" mode I am unable to select and delete columns.
...
1
vote
2answers
49 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
2answers
84 views
How to map a range of values to a single value in FME
A dataset with a set of points has an attribute called HEIGHTS which is filled with numbers like, 10.8, 0.4 and 150.6 etc... I want to transform this dataset to a shape file. In the transformation I ...
1
vote
1answer
103 views
Identify tool (attribute pop-up)
I hope this isn't too basic of a question...
I'm using ArcMap 10.1, and upon bringing in a feature class, the identify tool window shows the attributes in alphabetical order of the field headings. I ...
1
vote
1answer
58 views
stacked colours according attributes
I have a hierachical List of attributes e.g. column (1) S (2) SD (3) SD0
or (1) A (2) AN (3) An1 etc. So there is one S with several SD s and several SD0 in the attribute table. When I display column ...
1
vote
2answers
196 views
QGIS GPS position after entering attributes
I would like to be able to fill a form and, before, during or after, be able to cath a GPS point.
I already know the GPS extension but I have to catch the point and enter attributes after... Idea how ...
1
vote
1answer
169 views
How to save WMS getFeatureInfo points to a layer?
This may be a poorly worded question, because I am not sure of the exact terminology, but I'll give it a shot.
I have imported a vector layer from a WMS server into QGIS. I am able to query the ...
