16
votes
Accepted
Can someone help me identify this part of the map?
Here you find the map including the legend. The legend is in German, but I am German, so I tried to translate it as precise as possible.
I think (and please @Giancarlo correct me, if you disagree):
...
- 894
10
votes
Enabling all layers by default using Leaflet?
For the sake of completion, as per https://github.com/Leaflet/Leaflet/issues/3199#event-230611315:
Simply add the layer directly to the map.
map.addLayer(layer)
The control layer function will pick ...
- 1,077
10
votes
Accepted
What is the meaning of this linear scale of angles on this 1951 map of Iceland from the U. S. Army Map Service (AMS C762)?
I believe it is actually used to generate a Magnetic north line, using the reference point P on the bottom edge of the map. At least that's how I interpreted the statement in the declination legend (...
- 20.2k
10
votes
Accepted
Basemaps provided by Esri
Both clients - QGIS and ArcGIS Desktop/Pro - are rendering the same information - tiles of imagery, basemaps, etc. So really just images at the exact same resolution, so it has nothing to do with the ...
9
votes
Accepted
Plot tilted map in R
The examples in your link look like the coordinates have been transformed via a shear and a scale matrix. You can easily apply this to the coordinates you get from the usual fortify/join data that ...
- 61.5k
7
votes
Plot tilted map in R
Extending on @Spacedman's answer, creating a stacked map like the one shown in the question becomes quite simple. You just need to add another map layer and displace its y axis: e.g. aes(x=x, y=y+5) :
...
- 1,228
7
votes
Accepted
What is an "infiltration map"?
Infiltration map is the map of the proportion of water that would infiltrate into the soil in case of rain. During a rain event, you can neglect the amount of water that evaporate, so the water that ...
- 49.3k
7
votes
Accepted
Saving a map from a new print layout pane in QGIS
When you open a New Prin Layout, you have to give it a name - let's suppose you name it Layout_1. When you save the project, the layout is automatically saved, too.
If you close and restart QGIS, you ...
- 63.1k
6
votes
Offline Maps API for C# Desktop Application?
I suggest you to use this opensource library:
GMap.NET - Great Maps for Windows Forms & Presentation
GMap.NET is great and Powerful, Free, cross platform, open source .NET
control. Enable ...
- 410
6
votes
Can someone help me identify this part of the map?
German surveyors did everything according to rules. For the 1:100.000 Karte des deutschen Reiches, you can find it here:
http://www.landkartenarchiv.de/deutschland_topographischekarte_1896_legende....
- 76.3k
6
votes
Accepted
Why are heights given at various points on roads?
The answer is quite simple:
"Spot heights – shown as a number beside a dot – appear at strategic points, including along roads where they level out at the top or foot of a hill. These can be a ...
- 171
5
votes
Accepted
Esri Javascript API Graphics Removal
You are creating a new empty graphics layer gl but when you then call map.removeLayer(gl) it won't do anything as that new empty layer hasn't been added to the map yet. I'm guessing you wanted to ...
- 456
5
votes
Accepted
QGIS label spacing
If you open the layer properties dialog and navigate to Labels -> Rendering there should be an option that reads "Merge connected lines to avoid duplicate labels". This has usually helped me in the ...
- 1,858
5
votes
Plot attribute of shapefile with R
If you are looking for an interactive graphical view, mapview is the right choice. Use
## load packages
library(raster)
library(mapview)
## download data
esp <- getData(country = "COL", level = 1)...
- 5,183
5
votes
Create map using Leaflet and JSON
You have a JSON but Leaflet really likes geoJSONs, so you should convert the JSON to geoJSON first, or directly load a geoJSON. So for your example, if you have:
var data =[{
"latitud": 43....
- 223
5
votes
How to make proportional signs on QGIS?
In order to symbolize the pigs proportionally, you need to do the following, but I will use (cat) because I don't have a symbol for pig:
Open layer properties -> Style -> Select Graduated
...
- 40.3k
5
votes
Accepted
Displaying polygons with colour gradients that changes at value 0 using QGIS?
Yes, graduated is the way to go.
Open the layer style, choose graduated, and set the column to the one with the values you want to style.
Set the Mode to whatever best fits your range of values, ...
- 3,582
5
votes
Making a map with 8 different rasters of the same place but with only one legend in QGIS
As @JoshC mentioned in the comments, the same color ramp with min and max values has to be set for all the layers.
Make a note of the minimum value across all the rasters and do the same for the ...
- 2,130
5
votes
Accepted
Automating creation of multiple maps with different layers on same location in QGIS?
You can set layer visibility (in the layer symbology) based on an atlas variable. Your options for atlas variables are: @atlas_feature, @atlas_featureid, @atlas_geometry and @atlas_pagename.
In QGIS ...
- 24.3k
5
votes
Create quantity map in QGIS
For the example, I created a point layer with 5 points and a field "population".
Properties of your layer > Symbology > Simple marker > Assistant
The assistant allows you to vary the size of your ...
- 4,060
5
votes
Basemaps provided by Esri
I complement the anwer with this aclaration:
Esri satellite base mapa (Imagery) will render the same information (tiles, resolution...) in any user interface used, could be a desktop software or a ...
- 51
4
votes
Accepted
How to add a topographic map to a shapefile?
Your topomap is a SpatialLinesDataframe. geom_map is used for polygons. I suggest you use geom_path as below. It connects observations in original order. (geom_line would order by x value, which you ...
- 3,264
4
votes
Change the language of OSM maps in QGIS
You can not change the content of pre-renderd tiles. Since there seems to be no tile server with english labelling worldwide, you have to do it on your own:
Render the tiles using the Mapnik ...
- 76.3k
4
votes
Accepted
Download a region as KML/OSM from internet Maps
The best way to get boundaries of countries, provinces and regions is to use the OSM Boundaries application:
https://osm.wno-edv-service.de/boundaries/
Extracting boundaries from generic tools like ...
- 2,562
4
votes
Create map using Leaflet and JSON
As an alternative to @Joran's approach, you can skip GeoJSON completely and just iterate through the points, creating instances of L.LatLng and L.Marker as you go, like:
var points = [{
"...
- 10.1k
4
votes
Accepted
Changing temperature range in thermographic map using QGIS
In the raster style setting, set the contrast enhancment to Stretch and Clip to MinMax, and set the minimum and Maximum values to your desired range
- 8,546
4
votes
Keep customized colors with geom_polygon()
The trick to get the same colors in the ggplot is that you have to make a new vector repeating your color vector to reach the same length as the number of rows of the mapFrance object.
Try the ...
- 3,156
4
votes
Offsetting Atlas Generated Maps
Your best approach may be to create a new layer and put boxes that cover your desired extent for each polling station into it and then use that as your coverage layer in atlas.
- 79.9k
4
votes
Automating creation of multiple maps with different layers on same location in QGIS?
There is a relatively simple solution that I used to show or hide inset maps on different pages of an atlas. Just create the number of grids you need on your map item in the composer and then navigate ...
- 3,078
4
votes
Producing density map in QGIS
You want the "Graduated" symbology option.
Just choose the column the has the values and choose 4 classes.
- 16.3k
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