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 /...
kttii's user avatar
  • 3,630
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, ...
Houska's user avatar
  • 8,006
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 ...
Kingfisher's user avatar
  • 2,314
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 ...
Dan C's user avatar
  • 12.2k
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.
Ian Turton's user avatar
  • 81.5k
10 votes
Accepted

Blurry resolution when uploading DEM 5ft data onto QGIS

You have downloaded a digital elevation model (DEM). The top screenshot is showing a hillshade. You can either style the DEM as a hillshade or create a hillshade. Style F7: The same layer with ...
BERA's user avatar
  • 72.8k
9 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: ...
Oto Kaláb's user avatar
  • 6,905
9 votes

Add something into L.CircleMarker

This answer is based on @IvanSanchez idea of using L.divIcon for text and draw circle around it via CSS style. The main factor to make it successful is to set icon width and height to twice the ...
TomazicM's user avatar
  • 25.7k
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 ...
eurojam's user avatar
  • 10.8k
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 ...
lambertj's user avatar
  • 3,037
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 -...
Ryan's user avatar
  • 631
7 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(@...
MrXsquared's user avatar
  • 34.4k
7 votes

QGIS save raster error

Your raster size is 0x0 since your extent is only about 0.08 degrees latitude (the difference between North and South) yet you are asking for a resolution of 2.1174 degrees latitude. Ditto for East-...
Houska's user avatar
  • 8,006
7 votes
Accepted

How to fully customise LayerControl() in Folium?

It's possible via combination of three informations All layers inherit from class Layer https://github.com/python-visualization/folium/blob/master/folium/map.py#L30 and one of the option states the ...
ThomasG77's user avatar
  • 30.8k
7 votes

QGIS 'Powers of Ten' - How to output a series of maps with x1, x10, x100 scale?

Preliminary remark: I created the maps here using EPSG:3857 (Web Mercator) for demonstration purpose only and because projection is not the issue of your question. For many tasks, however, this ...
Babel's user avatar
  • 71.2k
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 ...
Vincé's user avatar
  • 1,414
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)....
Babel's user avatar
  • 71.2k
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'...
DPSSpatial_BoycottingGISSE's user avatar
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')) ...
aldo_tapia's user avatar
  • 13.6k
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 ...
J.R's user avatar
  • 16.3k
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 ...
geozelot's user avatar
  • 30.3k
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 ...
ahmadhanb's user avatar
  • 40.9k
6 votes

Understanding EPSG in WKT

For a full understanding see the specifications: https://www.ogc.org/standards/wkt-crs Interestingly, if you look at the EPSG registry (https://epsg.org/home.html) WKT2 definitions of those two CRS ...
nmtoken's user avatar
  • 13.4k
6 votes

Splitting legend in QGIS in to 2 columns

Resize your legend box to make your content "flows" in the 2nd column e.g the following screenshot
ThomasG77's user avatar
  • 30.8k
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 - ...
Aquamarine's user avatar
  • 1,176
6 votes

Categorized symbology with multiple variables (or nested categorization) in QGIS

This is a tricky one to answer as there are often lots of ways to achieve the same result! For example you could concatenate the sex, age and colour to remove the need for rule-based symbology and ...
ian's user avatar
  • 1,713
6 votes
Accepted

Categorized symbology with multiple variables (or nested categorization) in QGIS

Using the rule-based symbology, you can set symbols with specific shape and color for features you mentioned. Set the rules and labels as in the image, and assign an individual shape. label ...
Kadir ┼×ahbaz's user avatar
6 votes
Accepted

How to get coordinates of specific measurement in line layer in QGIS

Assuming your coordinate system in in meters (otherwise adapt accordingly), you can use the Geometry by expression tool with the line_interpolate_point function. Tool settings Your line layer as ...
Matt's user avatar
  • 16.9k
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 ...
IvanSanchez's user avatar
  • 10.2k
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
whyzar's user avatar
  • 12.1k

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