Most Popular
1500 questions
18
votes
1 answer
Why are there two Draw Effects buttons in Layer Styling Panel in QGIS?
At 3.10.3, I notice that the Draw Effects button is located twice in the Layer Styling window, as shown in this screenshot:
I've spent time testing them, and they both work equally well; that is, they seem to do the exact same things. One button's…
Stu Smith
- 8,252
- 8
- 35
- 84
18
votes
5 answers
Fetching the on-click data from the website into QGIS
I would like to fetch the on-click data into QGIS and show them as the placemarks.
Basically the issue comes from i.e this website:
https://eclipse.gsfc.nasa.gov/SEgoogle/SEgoogle2001/SE2024Apr08Tgoogle.html
whereafter the on-click you are getting…
Geographos
- 4,087
- 2
- 27
- 88
18
votes
2 answers
Checking Topology using QGIS
I have two Shapefiles with Polygons ( City and Forerst)
Is there a Plugin who is able check the topology (QGIS)?
Like "Knots do not overlap" or something like that. I dont want that they overlap.
Alex
- 251
- 1
- 3
- 4
18
votes
6 answers
AWS configuration for running low-to-medium bandwidth Web map app
Does anyone have experience with running Web maps (tile server + client JS scripting) on Amazon Web Services (S3, EC2 etc...)?
What kind of AWS configuration is needed for running a low-to-medium bandwidth Web map app, covering a small(-ish) area…
Igor Brejc
- 3,677
- 29
- 28
18
votes
1 answer
GDAL VRT Format - do I understand the concept?
Okay, so I'm a little fed up with different raster-in-database solutions that I tried over the last 2 weeks which don't work currently (PostGIS raster) or can't handle my volume of data (Rasterlite), so I'm reading about the VRT format. Bear with…
U2ros
- 5,117
- 5
- 29
- 51
18
votes
3 answers
"Select by Attribute" in QGIS using python?
Is there a way to use the function "Select by Attribute" in QGIS using a python command? In my plugin the user should enter a value via a GUI and this value should be used in a function which selects all features which have this attribute. The…
userHH
- 205
- 1
- 2
- 7
18
votes
2 answers
Concatenating export path in Google Earth Engine
My goal is to store different exports from Earth Engine projects in separate subfolders of a main GEE_export folder on my Google Drive. I'm using Export.image.toDrive:
Export.image.toDrive({
image: export_img,
folder: export_path,
…
Basile
- 3,543
- 3
- 21
- 49
18
votes
9 answers
Which Tools do you use for Classification of Remote Sensing Data?
Which tool do you prefer to use for classification of remote sensing data, e.g. classifying land use, and why?
Which other tools have you tried, and why did you decide against them?
underdark
- 84,148
- 21
- 231
- 413
18
votes
6 answers
Splitting polygon into multiple equal-width polygons in ArcMap 10
I am adding parking spaces into a parking lot, and I need them to be exactly the same shape and not overlap each other or have spaces between. In ArcMap 9.3, there was an editing task that allowed you to split a long rectangle into multiple,…
Tanner
- 7,375
- 14
- 62
- 109
18
votes
2 answers
How to generalize SpatialPolygons and conserving topology in R?
I would like to generalize a SpatialPolygonsDataFrame in R to make plotting more efficient. The polygons I have result in huge pdf plots that are slow to load and hard to integrate into a document.
I tried to use the gSimplify function from the…
yellowcap
- 3,013
- 22
- 36
18
votes
2 answers
Computing parameters for QGIS Affine Transformation
I have a vector floorplan (DXF) that I've added to a blank project in QGIS using the Dxf2Shp Plugin.
I've been reading tutorials and StackExchange threads, but I can't seem to find out how to "georeference" my layer?
I'm assuming I can somehow…
flackend
- 283
- 1
- 2
- 7
18
votes
2 answers
Where can I download OpenStreetMap data by geographic region?
I want to use OpenStreetMap data for an ArcEngine application I'm working on, and I need the data to be stored locally. I don't want to download the entire planet.osm file, but rather by state, county, region, etc. Are there any resources where I…
Tanner
- 7,375
- 14
- 62
- 109
18
votes
1 answer
Writing standalone Python scripts using PyQGIS?
I've been learning how to use the Python Console in QGIS using references from qgisworkshop.org. I'm familiar with writing standalone scripts in ArcGIS and want to learn how to do the same with QGIS.
For example, in ArcGIS 10 a simple standalone…
djq
- 16,297
- 31
- 110
- 182
18
votes
2 answers
Creating drop down list with values in QGIS
I want to show a drop down list in the feature attributes dialog.
I have three different building zones. The hot Wohnzon A, B residential zone and residential zone C. Now I have an attribute called the "Zonenart". Now I track a new zone. And instead…
user8839
- 603
- 2
- 8
- 16
18
votes
2 answers
How to get GDAL to create statistics for GTiff in Python
I regularly create my own GeoTIFF rasters with GDAL in Python, e.g.:
from osgeo import gdal
from numpy import random
data = random.uniform(0, 10, (300, 200))
driver = gdal.GetDriverByName('GTiff')
ds = driver.Create('MyRaster.tif', 200, 300)
band =…
Mike T
- 42,095
- 10
- 126
- 187