Questions tagged [tools]
Commands that require interaction with the GUI before an action is performed.
198
questions
6
votes
5
answers
8k
views
Move Label Not Working
I'm using QGIS 3.2 and want to manually move a few labels on a layer but when I try to use the move labels tool I can't move them. I can however rotate and change them using those tools. I looked in ...
- 185
3
votes
1
answer
303
views
Lat Lon Digitize tool not working with MULTIPOINT in QGIS?
I don't know what is a reason but in QGIS 3.2 "Lat Lon Digitize" tool doesn't work with MULTIPOINT, it works only with POINT layers.
Is it a bug?
- 1,060
0
votes
0
answers
48
views
Function process diagram of cut polygon tool
As far as the Cut Polygon tool from the Editor toolbar is concerned, polygons can be cut into two or more shapes according to that line drawn by a user.
Where can I get a detailed function process ...
6
votes
0
answers
546
views
Is there a specific tool to globally manage visibility/theme in QGIS?
In short : I'm looking for a Visibility Manager (QGIS 2.18) ou Theme Manager (3.0).
I couldn't find it in the QGIS plugin list or in different methods on gis.stack. Maybe I missed it and maybe it ...
- 7,718
3
votes
1
answer
2k
views
Using Polygon centroids tool - points aren't always inside polygon, can I fix that?
When I use Polygon centroid tool, points aren't always inside polygon, because some polygons have weird shape with holes inside them. I have big amount of polygons and I need to use this tool and I ...
- 173
0
votes
0
answers
50
views
Tiling image to be used with Google Maps?
I have a 2880 x 2880 image that I would like to tile so that it replace the entire usual world map.
So far I got this working
gdal2tiles.py -p raster -z 0-6 5KNewMap.png abc3/
but for the zoom ...
- 101
0
votes
0
answers
147
views
Densify tool equivalent for Basic ArcGIS License?
I'm looking for a tool/script/quicker process that does the same thing as the standard license's densify tool. I'm only using a basic license though. Just wondering if there was anything out there ...
- 311
0
votes
0
answers
137
views
Fast implementation of polygon overlay tools in osgeo suit
I am currently using symmetrical difference, difference and intersect tools from standard QGis implementation in python (I use pyqgis). I do topological checks ie. if Fc1 is contained within Fc2. ...
- 2,923
0
votes
2
answers
150
views
Adding a Tool to a DockableWindow add-in
I have inherited a C# ESRI (ArcMap) add-in that needs a UI tweak (the rest of the changes are completed). And I had no previous experience with such add-ins before starting on this.
The add-in in ...
2
votes
1
answer
2k
views
Is there any tool for coordinate system detection from a point coordinate?
I have bounding box points below;
-20037508.34, -20037508.34, 20037508.34, 20037508.34
Let's think about a tool that gives one of these points as an input and returns the coordinate system/...
- 187
3
votes
1
answer
261
views
QGIS Densify Geometries based on expression
I tried using the Expression Based Input in the Densify Geometries tool with the following expression:
attribute( $currentfeature ,'VertNum')
where VertNum is a field in the attribute table that ...
- 63
1
vote
2
answers
2k
views
Pause drawing button (plus others) missing from view window
The pause-drawing, refresh, and data/layout toggle buttons have disappeared from my view window. I'm using ArcGIS Desktop Standard 10.4.1. I've not upgraded recently or made any changes to the ArcMap ...
- 847
1
vote
1
answer
195
views
QGIS python error for XY tools plug in, even after installing xlrd and xlw modules!
As I am a complete beginner, I had troubles getting the XY tools plug in running. Now that the xlrd and xlw module error has disappeared after installment of said modules, I can finally choose the X ...
- 11
6
votes
2
answers
975
views
Adding new actions to identify feature context menu
How can I add new actions to identify feature context menu? I mean when selecting a feature with identify tool and right click on the selected feature, here I want to add new actions to the popup menu....
- 432
2
votes
1
answer
2k
views
Are there any free online GIS courses based around using QGIS? [duplicate]
Does anyone know of any MOOCs for learning GIS which use QGIS for any practical exercises?
I've been finding QGIS a fantastic tool for work, but would like to understand it and GIS principles on a ...
1
vote
0
answers
580
views
"Data management tools" does not exist under "Vector layer"? [duplicate]
I am using QGIS 2.18.12 and I need to calculate the area of overlap between two shapefiles. Help I've already found for this problem says to use "Data management tools" under "Vector layer" but the ...
- 11
1
vote
1
answer
520
views
Any way to create polygons with brush-like tool?
I’m making a hiking map for a small range of mountains. I’d like to show surface coverage, including a few broad categories of vegetation type, rock, sand, etc. I’d like to do this as vector data.
I ...
- 63
0
votes
1
answer
433
views
Opening script in Toolset using GPToolDialog()?
I need to open a Python Script using GPToolDialog(), but the script is in a Toolset, not in the Toolbox main path.
I tried many ways to solve but do not work, examples:
Example 1:
pythonaddins....
- 199
0
votes
0
answers
143
views
Python script from Python Toolbox do not work and show no error
I have a Python ToolBox with two Custom Python Scripts. The first one works well, but when I try to run the second, there is no errors, but the operation do not run.
import arcpy
class Toolbox(...
- 199
3
votes
0
answers
869
views
Error: 'Raster map not found' in QGIS 2.18.1 GRASS tools
I get the same error in multiple QGIS GRASS tools and I don't understand the error. I have a raster surface height map with some no data spaces I want to fill.
The error occurs when using r....
- 39
2
votes
2
answers
4k
views
Adding buffer in Leaflet?
i'm newbie in GIS.
i'm trying to make webgis using leaflet.
i already make layer with icon in leaflet.
/*layer*/
var layer = new L.GeoJSON.AJAX("GIS/layer/request_layer.php", {
...
- 53
3
votes
1
answer
920
views
Make this the only selectable layer (greyed out)
Someone else has tried Creating shortcut (button) for "Make this the only selectable layer" in Python 2.6? but, as pointed out there, the answer doesn't work.
When adding "Make this the ...
- 53
-4
votes
1
answer
6k
views
Generate flood map using qgis [closed]
How can I generate a flood inundation map and flood depth using QGIS within 3 hours?
1
vote
1
answer
240
views
How to add a prefix to unique ID using Attribute Assistant?
I want to add a prefix to my unique id field; for example, “MH123”. I am currently using Attribute Assistant Tool. How can I edit my Dynamic Value Table to add a prefix to my unique ID?
- 107
4
votes
2
answers
585
views
Determining best neighbourhood search radius for Topographic Position Index (TPI) for predictive soil mapping?
I'm not sure how to determine the best input values for a search radius to create a TPI for the purpose of predictive soil mapping.
Would this depend on the spatial extent of the area I wish to map?...
- 91
1
vote
1
answer
385
views
How to fix unusual initial DEM input values and derivative raster output values in SAGA GIS without rescaling?
I am trying to run elevation derivative tools on a provincial DEM provided by the Ontario Government website (Ministry of Natural Resources and Forestry) and I am getting strange values when bringing ...
- 91
2
votes
1
answer
591
views
How would I determine my search radius when conducting a Topographic Position Index in SAGA GIS?
When running the TPI tool in SAGA, I get this parameter-entry window:
Under the section highlighted in the red box, what do these parameters mean? Do the search/neighbourhood grouping parameters mean ...
- 91
0
votes
1
answer
708
views
Creating Topographic Position Index in SAGA GIS?
I am trying to create a TPI from a DEM tiff file in SAGA but keep getting the following result:
I'm just not sure what I'm doing wrong.
- 91
6
votes
1
answer
752
views
QGIS Calculating Line Lengths and Statistics
I am working through this tutorial:
http://www.qgistutorials.com/en/docs/calculating_line_lengths.html
In the tutorial we import a shapefile map of railroads,clip the data through a selection/...
- 281
1
vote
0
answers
735
views
How to show and access SAGA not shown in Processing Panel in QGIS 2.18.4? [closed]
How to get SAGA modules to show and be usable within QGIS, i.e. from within the Processing Panel?
I have tried reinstalling SAGA (now = Version: 2.1.2 64 bit) through the OSGEO4w installer and tried ...
- 907
1
vote
2
answers
46
views
Retrieving color information about pixels beneath polygon in ArcGIS Desktop?
I am using ArcGIS for a geology mapping project. I've mapped 500+ features as polygons using a basemap of a planet's surface. I want to get information regarding the "darkness," that is, the greyscale ...
- 11
2
votes
1
answer
372
views
Selecting features on PostGIS table from QGIS?
I use QGIS 2.14.11-Essen and PostGIS 2.1.8. This is an issue I had not with previous QGIS versions. I work with LTR version for my work so upgrade to current version (2.18.3) is not possible for now.
...
- 2,660
6
votes
1
answer
564
views
Evaluating training samples for supervised image classification in ArcGIS Pro?
Its my first time using ArcGIS Pro and I have started doing a supervised classification.
In most software you have some tools such as histograms, scatterplots and/or statistics to evaluate training ...
- 73
2
votes
0
answers
47
views
Volume calculation using Mosaic & Cut Tools [closed]
I'm new to ArcGIS and I'm taking an introductory course for it. I have a problem trying to quantify the volume of a lake. The lake is enclosed by two dams which are to be extended from 1909 to 1932 m....
- 21
3
votes
1
answer
386
views
Algorithm for Cost Connectivity tool of ArcGIS Spatial Analyst?
For the Cost Connectivity tool in the Spatial Analyst toolbox, what is the algorithm used to compute the minimum spanning tree?
The ArcGIS website includes a general description of how the cost ...
- 31
5
votes
1
answer
1k
views
Activating 'missing' standard GRASS utilities in QGIS Processing toolbox
I have been using QGIS and Grass for ages and while I've noticed this issue before, I've not been bothered by it until now. It is (hopefully) a bit of a noob question but when I open GRASS in the ...
- 33.5k
1
vote
1
answer
299
views
How to get next/previous layer in leaflet?
I want to create buttons to get next/previous layer but i don't know how to build code to make it possible.
var bounds = [[0,0], [2048,2048]];
var floor0 = L.imageOverlay('img/Floor-00-map.png', ...
- 11
3
votes
0
answers
332
views
Split selected features with selected line from another layer not creating all new features
Trying to use the split selected features with selected line from another layer to split a polyline in 2.
I run the tool and get the following output:
In the attribute table there are now 2 ...
- 557
0
votes
1
answer
800
views
Buffer(s) option missing [closed]
I want to create a buffer on a certain layer that will have radios of n meters.
I go to vector->geoprocessing tools -> and then nothing buffer(s) is missing I have enabled the Spatial Query ...
- 11
2
votes
1
answer
171
views
Counting within buffers using ArcGIS Desktop?
I am working on a project where I am trying to map affordable housing and bus stops.
I have used the buffer tool to find out how many bus stops are there within a one mile radius of each affordable ...
-1
votes
1
answer
183
views
Tutorial for raster analyse in ArcGIS or QGIS [duplicate]
Does anybody know where I can find some good tutorial for raster analyse in ArcGIS or QGIS?
- 339
3
votes
1
answer
962
views
MapInfo 'Info' tool - querying by polygon rather than at a point
MapInfo Professional (12.5) has a tool called 'Info' which interrogates the data for all visible and selectable tables when the user clicks at a specific point. It lists all objects from all tables, ...
- 41
2
votes
1
answer
1k
views
How to preserve properties (like -p) in topojson conversion in Mapshaper?
I'm trying to use mapshaper.org to convert some geojson files to topojson, and I need the identifying properties to be preserved.
Normally this would be done with the -p flag on the command line, but ...
1
vote
1
answer
105
views
Choosing layers for processing tools in QGIS?
Am I right that if I want to choose layers for QGIS processing tools I always have to choose the shapefiles via the path directory, and that I can't drag and drop them from the layer window on the ...
- 319
0
votes
1
answer
689
views
How to create (online / svg) map with rivers highlighted and without borders?
I want to create a world map on a website without administrative items such as borders, labels and without roads, only the continent outlines, but with big rivers visible (not like in Google Maps, ...
- 101
0
votes
1
answer
118
views
Is it possible to make a geodatabase feature class invisible?
I am working on creating a report for a customer that requires using a couple tools in arcmap then export values to a dbf. They then have to run a crystal report that pulls data from Oracle in the ...
- 160
0
votes
1
answer
557
views
Cut Tool or Process to mimic cutting in a "cookie cutter" like fashion
Say I have a sidewalk polygon, and on that segment of sidewalk I have 5 tree grates that I want to cut out of the sidewalk polygon. Is there a tool or an easy process that I could cut out one tree ...
- 1
2
votes
1
answer
493
views
In QGIS 2.14.0 The measuring tool is set to Meters even after changing it to feet in settings
I need to measure some lengths in feet, in previous versions I could change the units in the drop down window and it would stay on feet now it reverts back to meters, if you take focus off the measure ...
- 61
6
votes
2
answers
8k
views
How to identify feature from multiple layers in QGIS?
I have recently migrated from ArcGIS to QGIS.
Is there any way to identify a feature having multiple layers? I am currently working with about 400 shape files and need to know which is the one I'm ...
- 133
1
vote
0
answers
133
views
Understanding Mosaic to New Raster treatment of pixel values?
I'm working with arcGIS.
I have mosaicked 8 rasters with values ranging from -408 to 180. The new mosaic shows pixel values ranging from 0 to 180.Then I compared cell by cell values from the ...
- 785