3
votes
1answer
164 views

Extract one GPS fix per day from data?

I am in the fortunate position of having 2 years worth of animal movement data. With such a large amount of data I would like to extract only one fix per day to make it easier to work with. Data = 14 ...
1
vote
1answer
38 views

Creating New Layer After Sorting Attribute Table using QGIS?

I have been self-teaching myself some open source GIS. I downloaded QGIS and have been following this four part tutorial - ...
1
vote
1answer
22 views

QGIS 2.4 Attribute Table Search Bar?

I am learning how to use QGIS and am following various tutorials. My version of QGIS (2.4) does not have a "look for" search bar in the attribute table window as seen in older versions in screenshots ...
1
vote
0answers
37 views

Editing the QGIS Attribute Table

Is there a way to edit the name, type and length given to each column on the attribute table once the information has been imported from Excel?
0
votes
0answers
34 views

How to aggregate data which meet certain conditions using QGIS?

I have a point shapefile with meteorological stations which contains three columns, which are: Date: The date on which the measurement has take place (it covers a range of ten years) Id: The ...
2
votes
1answer
42 views

Not able to save edits to vector layer in QGIS

I have a vector layer with about 200 features. So far I have been able to add polygons to this layer just fine, now it is giving me trouble. When I draw the polygon and try to save edits, the polygon ...
0
votes
0answers
23 views

How to set QGIS action to open and search for features on Google Maps?

At the moment, I have an action that takes each term in an address field and conducts a search on EACH term in Google (ie. multiple tabs are opened for each term). The action code I have is the ...
3
votes
1answer
38 views

Can QGIS table editor achieve similar results to Pivot tables in Excel?

Is it possible to achieve similar results to Pivot Tables in QGIS table editor so as to use just QGIS instead of several software solutions? Or are there maybe some plugins capable of achieving those ...
1
vote
1answer
44 views

How to join two tables and convert joined table to a vector layer containing points in QGIS? [duplicate]

I have one table that contains 450 locations and a table that has 10'000 rows containing data and no spatial information. I have a column that allows me to join them. The issue is that I want to have ...
1
vote
1answer
41 views

How to perform a spatio-temporal query in attribute table? [duplicate]

I am not good at programming, so I would ask for your understanding concerning my question. I have an attribute table that contains five columns which are: (Date, ID, Latitude, Longitude, Rainfall). ...
0
votes
2answers
52 views

Using the Rule-based style to calculate each grid cell from overlaps

I am using the Rule-based styling properties (QGIS 2.2) to determine the colour of grid cells for a merged shapefile. Each grid cell defined by its ID may be overlapped by several layers as defined by ...
0
votes
0answers
57 views

How to keep all the unique columns of the shapefiles after merge?

Writing a script where the user is asked to select a directory which contains Folder_1 and Folder_2, both containing shapefiles and run various algorithms. The basic logical process of the script is: ...
0
votes
2answers
46 views

How to show attribute table in the form

Is there any way to show the attribute table of a layer in a QtextBrowser or a QtableView on form? I did this but,(shows attribute table in a separate dialog) I have no idea, how to show it in my ...
0
votes
1answer
30 views

QGIS: Comparing 2 attribute tables to discern unmatched attributes

In QGIS, I am trying to compare two different attribute tables. One is simply the updated version of the other. Each feature has a unique identifier. How can I return the number of unmatched records? ...
0
votes
0answers
29 views

Points on map disappear when apply certain column

I am a linguist who studied some variables in New Zealand English. Now I wanted to map the proportion of certain variables onto a map. It has worked fine so war and I've been able to map quite a few, ...
1
vote
1answer
34 views

QGIS 2.2: Attributes table keeps crashing

I am currently working on an intensive project that requires me to edit the fields of literally thousands of line segments. While updating the shapefile, it crashed on me. Today, qgis has probably ...
0
votes
0answers
55 views

PyQgis: How can I “append” features to a Vector Layer instead of “stacking” them?

As I read data from a text file and add points to a QgsVectorLayer (as well as related attributes), each new record gets 'stacked' on top of the previous one in the Attribute Table (and within the ...
0
votes
1answer
75 views

generate massive shapefiles

I have a shapefile with 1475 records, and I want to generate a shapefile for each record. What can I do to generate them avoiding selecting and exporting each record to do that?
0
votes
1answer
31 views

Piechart of a text column from attribute table in qgis

I have this problem: I would like to create a pie chart from a column of a attribute table, and I would like to see this pie chart above the map. The column contains names not numbers (I think fields ...
1
vote
0answers
41 views

Merging shapefiles to one, rearrange columns?

I am trying to merge two shapefiles which both contain polygons representing properties in QGIS 2.2. One problem is that the names of some of the columns in the attribute table differ between the two ...
1
vote
2answers
68 views

Auto fill second column with predefined names depending on first column (QGIS)

I want to create a point layer. In the attribute table I want to have two columns. In the first column I want to type an abbreviation like A. Then I want the second column to be auto filled with ...
3
votes
1answer
99 views

QGIS - Is it possible to increase Output Field Name?

When creating a new Column, the default value for the length of the name is 10. Using the Field Calculator via the Model Builder, I want to include the names of regional areas into the columns which ...
1
vote
1answer
32 views

QGIS how to add string field

I have a few point shapefiles. I want to merge them, but first give each point a certain type according to shapefile. How do I add a String field, all with the same word? (changing the field type ...
1
vote
2answers
52 views

Open mail client when clicking feature in Attribute Table

One of the attributes/features of my layer contains an email address. I'd like to be able to open the default mail client by clicking on the mail address from the Attribute Table. After some initial ...
1
vote
1answer
80 views

extract shapefile attributes from raster colors

I have two layers: a shapefile with states and counties (shp) a raster file (with colors and some text and borders, but not a perfect map) (tiff) I want to use the colors in the raster file to ...
0
votes
0answers
46 views

QGIS 2.2 Changeing txt data in theme table not working

A week ago I upgrade from QGIS 2.0.1 to 2.2 and try to edit some simple point themes I made recently. To my surprise, QGIS 2.2 randomly - not allways, does not allow me to change text I type into text ...
2
votes
1answer
47 views

loss of attribute data when copying between layers

I am trying to copy points from one layer to another in QGIS 2.2 The problem I get is that all the attribute data from the copied points is missing when copied onto the new layer, the columns show ...
0
votes
0answers
13 views

Link/unlink buttions in the Attribute Table's Form View

Toggling the edit button, in the Form View/Table View, buttons for adding/deleting a record is available. Two additional buttons are also available (Fig. 1). From the look of the icons they perform ...
1
vote
1answer
48 views

Alias's in the Attribute Table's Column Preview/Column Filters

We've spent some time setting up alias's in Layers/Properties.../Fields (Fig. 1) for database fields displayed as the column headers in the Attribute Table (Fig. 2). Switching the layout in the ...
3
votes
1answer
62 views

How do I add a field to a table using the QGIS graphic modeler?

I was wondering if anyone could help as I'm struggling to get anything out of the QGIS graphic modeler. For info I have no programming skills whatsoever. I need to be able to add a new field to an ...
1
vote
1answer
35 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", ...
2
votes
1answer
152 views

How to adjust QGIS attribute table view column width using Python?

I'm programmatically opening the Attribute table via Python through a plugin. All of the columns have a default width, but some of the data that I'm using do not fit. It's not enough to be able to ...
2
votes
0answers
62 views

How to open QGIS attribute table in form view using Python?

I've got a plugin where I load some layers. On the last layer loaded I show the attribute table. I would like to select the view different from the table view (see image). How can I do this in Python? ...
0
votes
1answer
51 views

Why do field values change when exporting from QGIS?

Today I came across a very strange behavior of QGIS. Maybe someone knows what's going on? I have a table with two fields which are defined as Double, with a Length of 20 and a Precision of 0. Some ...
0
votes
3answers
66 views

How can I change more than one attibute at the same time?

I'm working in QGIS 2.0.1 Dufour. I started by cretaing a shape file form an AutoCad file. The problem is that in the AutoCad, my layers had symbols like: "~; รง; ^". As the QGIS does not support this ...
1
vote
3answers
91 views

How to add data to an attribute table?

I have a shape file (points) and would like to add points using the attribute table and not the Add Feature tool at the main screen. I went over the Qs here, but didn't find a similar problem to ...
0
votes
2answers
309 views

QGIS select features from attribute table using the “LIKE” operator

I created an expression with the help of the GUI in the QGIS attribute table of a vector (shapefile) layer of Native American ("Indian") reservations in the USA state of New Mexico. "NAME" LIKE ...
8
votes
5answers
303 views

Print out the properties of the attribute table in qgis?

I have to merge a lot of shapefiles into one great shapefile. So I want to compare the properties of the attribute tables to see if there are differences between the tableproperties of each shape ...
0
votes
0answers
38 views

QGIS attribute values are changing when I save and stop editing a layer

I'm working with QGIS 2.0.1 on Windows XP. I'm creating a shapefile of points with one attribute column for a 10 digit phone number. I've tried setting the type as both string and integer, but I'm ...
0
votes
0answers
41 views

QGIS 2.0 - how to search attributes for string?

How do you use the "Select by Expression" widget in QGIS 2.0.1 to select Attributes in a vector attribute table? How can a person with no SQL background learn to do this quickly?
0
votes
1answer
53 views

attribute table in qgis wont save custom values

I am trying to edit a point shapefile in qgis and I have editing on for that layer, I have added a new column for the custom data, I have set it to text and have 8 characters allowed in the column ...
1
vote
2answers
162 views

How to add a new column in attribute table with attribute with indexes of another max-min ordered attribute field?

I've an attribute column named e.g. VALUE with different values I would like to make a column named e.g. ORDERsuch that the greatest value has the attribute 1 the second value 2 etc. etc. so order ...
1
vote
2answers
203 views

How can I replace all null values from attribute table to zeros?

I have a new column in my attribute table with a lot of null values and I want to replace all them to zeros. How can I do that in calculator? I'm using QGis 1.8 Thank you!
0
votes
1answer
82 views

How can I access second (or even third) level attributes in a vector layer and add them to the attribute table? [closed]

I got some .dxf file containing buildings I need for my map. The file loads nicely into QGIS and I converted sucessfully to shape. I still can find the Information I need (the buildings height) in the ...
0
votes
0answers
44 views

Is it possible to do subForm on QGIS attribute table

I envy, I have data which repeats differ only in a few fields out of 20. Is it possible to over-lapping comfortably enter data manually (that is automatically duplicate the program, such as ...
2
votes
1answer
57 views

QGIS; Is it possible to show layer name in attribute table in print composer?

When adding attribute tables in the print composers it is not possible to distinguish between various tables from various layers; each table is generic and does not indicate which layer the table is ...
0
votes
1answer
35 views

Inserting attribute table into QGIS Composer is limited to 99 rows

Inserting attribute table into QGIS Composer is limited to 99 rows? Or am doing something wrong? Stems from How to import or incorporate formated Excel tab into QGIS print composer
3
votes
1answer
948 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 ...
6
votes
1answer
2k views

How to rename attributes/fields in a shapefile 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
60 views

Using Raster Data in a Vector Layer's table in QGIS 2.01

I have a vector layer containing point data representing floor levels. The attribute table contains: Easting Northing Floor Level I also have several water surface levels representing the ...