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2
votes
0answers
35 views

Flowmapper Error

i have a problem using flowmapper plugin. But i don't now why. This is the message: Traceback (most recent call last): File ".../python/plugins\FlowMapper\flowmapper.py", line 2656, in run flowpyv07....
1
vote
0answers
78 views

QGIS 2.14 open raster crash [closed]

I am using QGIS 2.14 on Mac OS X 10.11.3; every time I try to open a raster file, in any format, QGIS crash, any suggestions?
2
votes
0answers
46 views

QGIS Atlas zoom to intersection between two different layers

I have two polygon layers, one is about different land owners boundaries and is used for atlas generation, and the other is about forests inside each property. In atlas generation sometimes i want to ...
1
vote
1answer
90 views

How to publish SQL Server Spatial views to GeoServer?

I have a web mapping service created on ESRI infrastructure (ArcGIS Server (WFS and WMS) with editable data from SQL Server Spatial. I am trying to switch from ArcGIS to Geoserver. I have published ...
4
votes
1answer
60 views

Reshape polygon to boundary of other polygon

I have two polygons. The first one has a white background and brown boundary. To othr has the pink background. how is it possible to reshape to first polygon to the boundary of the other polygon?
4
votes
1answer
74 views

How to display different SVG icon in the same layer in QGIS

I am working with a ponctual layer in QGIS 2.12.3 (Lyon). I have a determine a few points in my layer. Each point represents a different activity (ex : climbing, hiking, etc). In order to have a ...
0
votes
0answers
22 views

Update Postgis table by selecting features from other table

I am writing a QGis plugin which uses psycopg and python to interact with a Postgis database. When trying to update like title says, I get syntax errors. The basic idea is to update initial and end ...
5
votes
2answers
192 views

How to find disconnected islands in a road network layer, using QGIS

I have a road network layer that can't route from one side of the layer to the other. Topologically, there is no connectivity between the start and end nodes, probably due to missing links. This ...
1
vote
2answers
78 views

QGIS equivalent to arcpy.SearchCursor?

What is the equivalent in QGIS (or other FOSS) to this: rows = arcpy.SearchCursor(table, fields="ORIG_FID; field1; field2; field3; field4", ...
2
votes
0answers
26 views

Annotating images on QGIS or using widgets?

I've georeferenced an old map on qgis and layered it on top of OSM, I want to do a class project and for it I would like to pinpoint certain areas on the map of which I have old photographs. I would ...
3
votes
0answers
39 views

QGIS “Align Edge” equivalent?

I'm trying to move from Arc to QGIS, and spend a lot of time making maps out of polygon features. One tool that I can't find is an equivalent to ArcGIS' topology tool "Align Edge" - is there such a ...
6
votes
3answers
115 views

Variable window (“kernel”) size for raster processing

I'd like to use differently sized windows as I process (a.k.a. filter) a raster, with the size varying according to latitude. There are tools that allow a user to specify custom windows (e.g., "User-...
3
votes
1answer
82 views

How to use regular expressions within QGIS Actions

I have stored html links in a column of a postgis layer. There are a few entries which have multiple links stored in one cell (blank separated). I have to use the firefox.exe to open the links in ...
2
votes
0answers
26 views

splitting line layer using another point layer

how to split a line layer using another point layer in qgis? I am having one point layer & one line layer. I want to split the line layer between two points[those two points belongs to point ...
1
vote
0answers
116 views

What is the recommended way for team coordination in GIS (ArcGIS, QGIS, etc.) [closed]

I am preparing a team of around 18 GIS analysts to work on 12h/12h work cycle to attain 24h/day work rate. This means two 9-person teams, one for each period. All analysts will have access to various ...
1
vote
1answer
21 views

Keep Unhandled layers in QGIS

I saved a .qgs file with home server postgis layers. Had to work remotely, but will lose unhandled layers upon opening the file. I can connect to these through my GeoServer, but I'm going to lose my ...
2
votes
0answers
17 views

Disappearing labels on large maps' edge - Easy Custom Labeling Plugin - QGIS 2.8.3

I've been using the Easy Custom Labeling plugin to fine-tune placement of labels. However, I have been having some labels disappear when they are on the edge of large maps. For example, I have an A0 ...
3
votes
1answer
41 views

gdal2tiles generating nosensical data

I'm trying to convert a global irradiance map - generated by r.sun - into tiles to be layered onto OpenLayers using gdal2tiles. However, every single one of my outputs is turning into white noise and ...
1
vote
1answer
54 views

Joining multiple polygons inside a single polygon in QGIS

I need to somehow "join" information from two shape files: zoning - these are large polygons indicating the zoning code for a moderately large area, typically hundreds of separately owned parcels (...
2
votes
1answer
225 views

How to set QGIS 2.14 on OS X to use GRASS 7

My current QGIS installation (2.14) on OS X 10.11 is set up to work with GRASS 6.4.4. I am guessing this is the default GRASS version that comes preinstalled with the QGIS package maintained by ...
3
votes
3answers
57 views

QGIS Spatial join using subset of features?

I have a road network shapefile, as well as a postgis layer of different areas in a city. The areas file contains one big polygon containing everything (the service area), and then a series of ...
3
votes
1answer
38 views

Lines appearing on vector layer after panning in QGIS

One of my vector layers is creating random-seeming lines whenever I pan across the map. It's only one layer and the lines disappear if I turn it off. It doesn't appear in the print composer so it isn'...
3
votes
1answer
78 views

Projecting points towards selected line layer in PostGIS/PostgreSQL

I have a point layer (ad.shp) and street layer (st.shp) and I am trying to project the points to the selected street in a distance of 20 meters (snapping all points to the lines within 20 meters) ...
2
votes
0answers
43 views

Is it possible to make a multiple line coordinates in QGIS 2.12.1 map comsposer?

I'm trying to display a 2 line coordinates, where the thousands are on the top row, and the units are on the lower row. I've tried to custom coordinates using the following expression: left(@...
2
votes
2answers
156 views

Converting shapefile CRS from WGS to UTM in QGIS

I want to calculate point distance but the result is null, and apparently it is because the point and the raster file have different CRS. The raster is UTM, and the point is WGS84 I follow the ...
3
votes
1answer
74 views

How to get the feature id of features added to dataProviders?

My question is somehow related to the problem of finding the id of the last added feature: I am looking for a way to supply the feature id and another attribute of each added feature through a signal. ...
3
votes
1answer
88 views

Writing a custom function in QGIS to rank features

I have written the following custom function in python for QGIS, cobbled together from various sources. The aim is to use it in the expression editor to return the rank of each feature based on the ...
0
votes
0answers
17 views

loading SpatiaLite tables with WHERE clause with pyqgis

the question is very simple. I have some layer in a SpatiaLite database that I want to filter and load in QGIS through pyqgis. From the pyqgis cookbook I read that it is possible to add a WHERE ...
2
votes
1answer
69 views

Copying/pasting feature geometry only

Does anyone know of a way in QGIS to copy a single feature in a layer and to paste it back into the same layer WITHOUT copying over the attributes?
1
vote
0answers
30 views

having a standard value when filling in attribute table

I am using QGIS to collect field data and I wonder if it is possible to have a standard value apply to some of my attributes unless I say otherwise. I fill my attribute table with several drop down ...
1
vote
1answer
41 views

Is it possible to edit layer transparency in .sld or .qml file for use in QGIS?

Say I have a shapefile with 20 graduated classes that I'm using in QGIS. I want to save the layer style so that I can use it on other shapefiles, but I can't edit the layer transparency without ...
1
vote
0answers
47 views

Create Layer With Selected in QGIS

Came across this "Create layer with selected" button in the result for a Spatial Query in QGIS. And simply, this creates another layer from the same source with a query on the IDs. Does anyone know if ...
1
vote
0answers
27 views

QGIS 2.8.2 Print Composer Attribute Sorting

I need to sort an attribute table added to the Print composer layout with Alphanumeric characters. I understand this is not desirable but the field is for naming farm paddocks...hard to avoid that. ...
6
votes
1answer
126 views

Why isn't QGIS detecting CRS from .prj file?

I have a number of 1 km hexagonal grids that cover various counties in the United States in a postgreSQL/postGIS database. Each grid has the CRS EPSG:3857, and the counties layer has EPSG:3857. When ...
2
votes
0answers
323 views

QGIS 2.14 fails to install on Ubuntu 14.04

My previously working installation of QGIS 2.14 on Ubuntu 14.04 suddenly failed to start QGIS. I have been trying to reinstall QGIS without success. I have tried several ways to completely uninstall ...
2
votes
0answers
42 views

QGIS Override MapTool Python

My goal is to reuse the default edits tool of QGIS in a custom App. But I would like to modify some behavior with those tools. For instance, the MapTool beside the Edit Node Action. iface....
2
votes
1answer
72 views

Setting a threshold for unions

So I have a shape file of buffers. What I'm trying to do is to merge the buffers that intersect, but not just if any part of the buffers intersect. I would like to set a threshold, for let's say if 50%...
3
votes
1answer
86 views

Color gradient to show direction in polygons (filling, color ramp, gradients)

My data is 2 point-layers: 1 layer origins and 1 layer destinations. I connected these pairs of origins and destinations: firts with lines. As I know that in qgis, there is still no gradient fill for ...
4
votes
2answers
72 views

How to select all features with maximum classification value using a processing algorithm?

I am building a Processing Model working with large vector Datasets with classification values. My vector file contains a lot of features (40.000) with one column containing classification values ...
3
votes
2answers
55 views

Cannot load vectorlayer PyQgis

I am having a hard time loading a vectorlayer from the console. Not from the Pythonconsole within QGIS, but from the console on my computer. I later want to write a standalone script! That is what I ...
1
vote
2answers
54 views

How to select polygons by duplicated attribute value from a shape file?

I have a shape file that contains many polygons(>200,000). Some of these polygons are assigned the same ID number. None of the polygons overlap other polygons. I need to find a way to select out all ...
2
votes
1answer
39 views

Getting equidistant regions from a map with qgis

I'm builing a webapp for which I need to get some GIS work. I have a csv file containing data from a city, split by district, with the following relevant elements: lat, long, geoJson(multipolygon for ...
2
votes
2answers
84 views

Labeling MSSQL-Layer in QGIS 2.14

I am using QGIS 2.14 and have problems with labeling a layer. My layer is a MSSQL-Layer (from a GIS-Server) and the fieldtype I am using for labeling is a Sting (typename is nvarchar).If the string ...
3
votes
2answers
87 views

Printing over-sized QGIS map

In QGIS, how can I output a map 84 in. x 72 in. at 300 dpi with QGIS 2.12.3 and Windows 10? In print composer, I can dimension the canvas and set dpi, but it seems that I cannot add my map at ...
2
votes
0answers
46 views

How can I create a grid of polygons from a .csv file or line vector in qgis?

I have a map defined by two seperate reference systems: one is a standard grid coordinate system, the other a series of irregualar polygons. I want to find which polygon each grid square overlays, and ...
4
votes
0answers
91 views

Which statistical methods to compare the spatial distribution of two different variables in two raster maps?

I am working with two global raster maps using the R Software (original file: netCDF for map 1 and GeoTIFF for map 2), with a resolution of 5 min of arc. Map 1 contains data on the share of the land ...
3
votes
1answer
114 views

Is there a QGIS equivalent to ArcGIS' Convex Hull and Circle under the Minimum Bounding Geometry tool?

I have the opportunity to run ArcGIS and QGIS side by side for a few months and was looking to see what comparisons there are. So I'm interested to know if there is a similar tool on QGIS?
1
vote
0answers
46 views

Form opening after stopEditing pyqgs Qgis

I made a form that binds some fields on a shp in Qgis (works fine), and after stop editing event the form appears again.. Do you have any ideas? Made so far: ## action self.editingObject = QAction(...
3
votes
0answers
19 views

Adding nodes to multiple, stacked features

Am am working in QGIS on a dataset with multiple, overlapping polygons, often sharing borders. Sometimes I want to adjust a border, and need to add more nodes. Normally I would doubleclick a line to ...
3
votes
1answer
68 views

QGIS Add feature python script

New to python, and been looking at this for a while, trying to write a scrip to automate a process we need to carry out in QGIS a few thousand times. As part of this I need to create a feature into an ...