27
votes
Exporting map with transparent background in QGIS
Steps for QGIS 3.6
A few things have been moved and renamed from QGIS 2.x (see below), this is how it works in 3.x:
Open a new Print Layout (formerly "Composer"): Menu Project - New Print Layout
...
- 2,575
24
votes
Accepted
What types of lat/long coordinates are these?
They are likely "Degrees, Decimal Minutes".
Conversion to Decimal Degrees
You can convert it to "Decimal Degrees" by diving the "Decimal Minutes" by 60 and adding the result to the Degrees:
21.440 /...
- 3,520
13
votes
Accepted
Adding North Arrow which adjusts to the map rotation in QGIS
There's an option under Item Properties to do this, but it's only available for an Image item, not an Arrow, which may be why you're not seeing it. You need to add your north arrow from an image (...
- 12k
11
votes
Saving huge detailed map with background into TIFF for printing size A0
Some approximate numbers: A0 paper is about 1m each side, a 600 sq km area is about a 25x25km square. So your printed map will be at a scale of 1:25000, more or less.
I'm not familiar with SAS.Planet, ...
- 6,445
10
votes
Layman friendly method to create a shapefile
QGIS is a free, open source GIS. It can be downloaded at https://qgis.org/en/site/forusers/download.html.
The program comes with some tutorials, including how to create a shapefile. This is the link ...
- 2,234
10
votes
How can I conceal peoples' precise locations in ArcGIS Pro?
Group your data geographically, mapping total positive cases by ZIP code, county, state, province, or whatever area. Start with a small unit of area (maybe a city block) and if you think that's too ...
- 12k
10
votes
Accepted
How to format latitude and Longitude labels to show only degrees with suffix without any decimal or minutes?
I would do this by selecting Decimal with Suffix for the format and at the bottom of the Map Grid Properties select 0 for Coordinate Precision.
- 75.4k
9
votes
Accepted
Making bivariate colour ramp with QGIS
Excellent answer by @Martin but it seems you have 2 attributes you want to have a colour gradient (Plantation Cover and Forest Harvesting Intensity). If I'm mistaken then I will remove this post. You ...
- 72.5k
9
votes
Using two different maps on one atlas page
Yes you can do this with the expression string builder overriding the extent of the second map regarding the extent of the first map which is controlled by the atlas. Supposing your two maps have the ...
- 7,880
8
votes
How can I conceal peoples' precise locations in ArcGIS Pro?
I agree with @Dan C. Adding ambiguity via some form of aggregation to your point data is a much better strategy than trying to modify the basemap or other reference layers.
To count points within your ...
- 2,639
7
votes
GeoPandas installation errors
Not a GIS related issue, but a conda issue. You are trying to install in the base environment and there might be package version conflicts. Try creating a new env and installing there:
conda create -...
- 611
7
votes
Accepted
Google Maps not being quite top-down in QGIS
I assume you have zoomed in quite a bit to see such details.
It is a common misconception that you can see satellite imagery in Google Maps' Satellite mode. If you zoom in enough to see details you ...
- 917
7
votes
Accepted
Creating graduated classes for election swing map in QGIS
You have a range from -200 to 150 and you want the white color to be at 0. In your color ramp, white is at 50%, thus exactly in the middle - thus for your range of values at -25 (mean of -200 and 150)....
- 41.9k
6
votes
Creating disease risk map in QGIS?
The simplest way to run your analysis (without trying to define your actual inputs) is to do some basic raster algebra.
Have a go with the raster calculator: https://docs.qgis.org/2.8/en/docs/...
- 13.1k
6
votes
Accepted
Improve mapping effect QGIS
You can change the style of your point symbol (reducing its size and setting a transparent boundary). As your point seem to be a regular grid, you could also use squares instead of circles. You can ...
- 48.7k
6
votes
Accepted
How to create high quality map with QGIS and Stamen tiles
Check the instructions from Underdark about using OSM data (same as Stamen uses) with some style files she has made (see below for links)
These have completely changed print cartography for us - we'...
6
votes
Accepted
R tmap package: basemap not working
Change default tmap_mode('plot') to tmap_mode('view'):
library(tmap)
data("NLD_prov")
tmap_mode('view')
tm_shape(NLD_prov) + tm_polygons('population') + tm_layout(basemaps = c('OpenStreetMap'))
...
- 12.2k
6
votes
Accepted
R and Mapview: How can I chose different colors for different layers?
You have to add arguments for colors, see ?mapview. In your case for main color you can use col.regions=list("red","blue") and col=list("red","blue") for outlines. So whole code could be like this:
...
- 6,487
6
votes
Accepted
Creating Bivariate choropleth map a.k.a. Relationship map in QGIS
What you're looking to seem to be more generally called "Bivariate choropleth map" looking for these term will get you some answer.
For example this one by Joshua Stevens
It's to long to fully ...
- 12.2k
6
votes
Adding meridians and parallels on world map in QGIS
You could just use
<QGIS>|Vector|Research Tools|Create Grid...
where you
chose your Grid type (likely Line)
set the Grid CRS (i.e. to EPSG:4326 - WGS 84)
set the spacing you want in degree
...
- 24.4k
6
votes
Scale bar in QGIS shows incorrect measurements
It seems you are using WGS84 geographic coordinate reference system (CRS) or any other CRS that uses degrees as a unit of measurement. Therefore, adding a scale bar has no meaning in your layout, as ...
- 36.5k
6
votes
How to format latitude and Longitude labels to show only degrees with suffix without any decimal or minutes?
In your grid properties first make sure to choose EPSG:4326 as CRS, then choose "custom" as coordinate format and click on the expression button next to it:
Now use this expression:
abs(@...
- 26.2k
6
votes
How to remove the cells are zero or null from the map
If all you want is to hide the 'empty' cells then adjust the legend so that the first class starts at 1:
If you want to delete the data - open attribute table and select by expression and delete - ...
- 839
5
votes
Accepted
How to set layout element's "name" property in ArcMap?
OK, so the "Element Name" box appears to be the likely solution. This is non-intuitively placed in the "Size and Position" tab of the map layout element's properties dialog box.
- 221
5
votes
googlemutant and leaflet problem view data
That's because you didn't create a new map using Leaflet + Leaflet.GoogleMutant. That's because you copy-pasted the code from https://ivansanchez.gitlab.io/Leaflet.GridLayer.GoogleMutant/demo.html ...
- 9,410
5
votes
Generate flood map using qgis
This is a good video that provides you with a walkthrough on generating a flood inundation map, QGIS Flood Risk Mapping Walkthrough. Also, you can find additional case study here
- 11.9k
5
votes
Accepted
Sorting MXDs with specific attributes and exporting to specific directory?
You are messing with the iterated variable, mxd within the for loop, but worse than that, you are assigning it an object within the loop which is of a completely different class to what the iteration ...
- 6,722
5
votes
Creating automated maps for attributes in QGIS
Automating the creation of maps is the job of the Atlas feature, a real ace of QGIS when it comes to production.
It is very easy to master and ensures powerful results.
From any layout, access the ...
- 5,347
5
votes
Is it a sank ship please see near japan
This is not a ship that sank. It is a result of how the background image is made up of a large number of images that are combined.
Google uses a multitemporal approach to creating their basemap and ...
- 6,396
5
votes
Accepted
Trying to create a Cartogram and the st_transform function does not work
There are two different and mostly incompatible ways of storing spatial data in R - the sp package which works with objects with names like SpatialPolygonsDataFrame and the sf package which creates ...
- 52.8k
Only top scored, non community-wiki answers of a minimum length are eligible