1
vote
1answer
42 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
328 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 ...
1
vote
1answer
198 views

QGIS Advanced String Filter Expression returns too many results

"GNR" is a string column and I expect the filter expression "GNR"='.11' to only return the feature with the value '0.11'. Why are the other features with values of '.110'and '.1100' included? Is ...
3
votes
1answer
85 views

Is it possible to save frequently used expressions in QGIS?

Is there any way to save frequently used expressions in the selection or field calculator dialogs? Obviously I can cut and paste them into a file where I might save them, but I mean within the context ...
2
votes
2answers
95 views

Save multiple selection sets in QGIS

I'm looking for a feature in QGIS but I am not sure if it exists. I don't know the name of such feature, but I call it multiple selection sets. It exists in TransCAD and I find it very useful. It ...
1
vote
1answer
213 views

Select by SQL in QGIS Python

In the GUI there is the Query Builder, but that does not seem to be easily available in Python. The processing (SEXTANTE) module has the qgis:selectbyattribute algorithm, but that only supports ...
3
votes
2answers
407 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 ...
4
votes
1answer
135 views

How to print selected features in QGIS?

I have a detailed map in qgis (vector, .shp) and I would like to split the map in four parts based on attributes to print each part of the map separately. Unfortunately, I didn't figure out how to do ...
3
votes
1answer
87 views

How to select features by matching attributes of two SHPs?

I have one line shape file with lot of road sections and a point shapefile, some of these points are outside my area of interest. The files have one attribute in common and I would like to do ...
1
vote
1answer
342 views

How to select features where attribute is not NULL?

I have an OS AddressBase shape file. One of the attributes is 'paoText'. It is either a text string like 'Anchor House' or is NULL. I want to extract all the records where there is a text string ...
4
votes
2answers
3k views

How to give multiple colors to features within a single shapefile?

I want to give multiple colors to different features within a shapefile based on attribute values , is this possible in QGIS ? If yes what is the procedure ? Is there a way to provide color by means ...
16
votes
5answers
19k views

Get list of coordinates for points in a layer?

I've got a layer in QGIS that is comprised of points. Its attribute table doesn't have (show) the corresponding x and y coordinates for each point. Is there a way for me to extract a list of ...