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Questions tagged [cartography]

Using artistic and scientific principles for creating maps and graphically representing geographic areas

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Making population density map in QGIS

I have a CSV file of Red Squirrel trail cam sightings. The file has multiple sightings for each trail cam location and includes date, time and location. Using the Heatmap symbology gives me a good ...
Vic's user avatar
  • 431
-1 votes
0 answers
15 views

Graphic display showing geographical layers with local content

I am looking at establishing how to create something similar like the below image that I can create myself depicting local datasets/overlay. Are there free applications I can look at?
Amelia Nicodemus's user avatar
3 votes
1 answer
89 views

Excluding some values from the quintile classification in QGIS

I am working in QGIS with a vector layer of about 8000 records and I would like to use the graduate symbology, equal count (quantile, 5 classes) with a variable that contains some records to which the ...
Geo_it's user avatar
  • 523
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0 answers
12 views

How to write an SLD to put the lower left corner of the external symbol on the points in GeoServer

I have a point layer in GeoServer and I used a simple SLD like this: <sld:StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:xlink="http://www.w3.org/1999/xlink" ...
milad's user avatar
  • 729
5 votes
1 answer
211 views

Force label to be along the lower perimeter of a polygon in QGIS

Some of my grave plot numbers are rendering on the L/R boundaries of polygons rather than being always on the bottom line. How can I force this? These are my Label settings. I have tried the Angle ...
GeorgeC's user avatar
  • 8,238
1 vote
1 answer
108 views

How to enable automatic georeferencing of hand drawn lines

Our company does a lot of bird surveys, we often need to draw flight patterns on a paper maps and convert these lines into shapefiles to create digital maps (e.g. of migration routes) for our reports. ...
chente's user avatar
  • 11
1 vote
0 answers
135 views

Legend Spacing in tmap

My problem is that I am using tmap to create cartographic maps, and similar to ggplot I need legend spacing between the legend keys but I can not figure out how to implement the legend spacing in tmap....
user234615's user avatar
1 vote
1 answer
94 views

Making world map with terrain colours in QGIS

In QGIS I would like to create a world map that has terrain colours (e.g., deserts or vegetation), as in the attached map (Gehring et al. 2022), particularly for the African continent. How should I ...
Andrea Fontana's user avatar
0 votes
0 answers
35 views

How can I apply multiple rules in GeoServer CSS while avoiding the generation of multiple legends?

I'm using GeoServer with CSS to style map features. I've defined multiple rules based on the 'street_wid' attribute and a label rule. However, applying these rules results in multiple legends. I want ...
Cherryl Rarewings's user avatar
0 votes
0 answers
59 views

How to create a map like the attached one?

I have come across some maps (visualizations) similar to the one attached and I would like to learn how to make them. I work with ArcGIS Pro and QGIS extensively, however, I think this is more a ...
user1919's user avatar
  • 2,654
0 votes
0 answers
136 views

How to get bbox coordinates of text on cartopy map

I'm making a map using cartopy in python and am labeling the countries based on the centroid of the country. However, if a name extends outside of the map's crop I would like to move the label so that ...
JWB's user avatar
  • 604
2 votes
1 answer
75 views

Is it possible to have a diffuse transition between two polygons?

(QGIS) I'm working on a habitat map. The aim is to map the different habitats in an area in order to produce a map. The habitats are identified by polygons. But sometimes habitats are gradually ...
Hydronium's user avatar
6 votes
2 answers
251 views

Representing five categories of data in one symbol using QGIS

I have been given the big task of representing a lot of data in one symbol. The plan is to represent 5 categories of data in one symbol. I hope to do this by changing factors such as: Fill colour ...
Murray Horn's user avatar
6 votes
1 answer
112 views

Displaying densely curved vectors at smaller scales

Some time ago I came across a QGIS cartographic technique that solved a problem that occurs when detailed vector data is displayed at smaller scales: densely-curving lines become smudged and look ...
Stu Smith's user avatar
  • 8,192
5 votes
1 answer
103 views

Dividing the scale bar to the left of zero in QGIS

I'd like to add a 2.5 km value on the left of the 0 value in my scale (divide the rectangle from 0 to 5 into two smaller ones). How to do it?
Shinobido's user avatar
  • 317
1 vote
2 answers
178 views

How to rotate a SVG symbol based on a formula of column value and literal value (90 degrees) in GeoServer

I have a shapefile that I have stored in GeoServer. I have some SVG symbols that I want to use for each point. I want the SVG symbols to rotate based on the orientation column (attribute value) in the ...
milad's user avatar
  • 729
1 vote
1 answer
67 views

Overlay colors onto specific 1 degree x 1 degree grid squares in R

I am trying to color in specific grid cells within a map to highlight sampling effort. I can generate the map but then I am unsure how to use utilize the data points I have to color in the entire grid ...
J_S_Moss's user avatar
2 votes
1 answer
93 views

What is this "flag" marker in bottom right corner of altas? [closed]

A relative has a "Political map of the world" on the wall in their house. It has this "Flag" symbol in the bottom right corner. There are no other symbols like it on the map. What ...
EdL's user avatar
  • 128
1 vote
0 answers
170 views

Automate layout design on ArcGIS Pro

I have 100 different layouts, each zoomed to different polygons on the map. I would like to add two accompanying images, that are unique to each layout and positioned as shown in the screenshot below. ...
Jessie's user avatar
  • 31
-1 votes
1 answer
304 views

Is there a way to make land classifications with simple RGB satellite images?

The area of interest I am working on mapping is quite small, just under 10 acres. I need to create simple landcover vectors (trees, low vegetation/grass, water). I don't have access to high enough ...
Riley Hughes's user avatar
6 votes
2 answers
438 views

Creating graduated classes for election swing map in QGIS

I am using QGIS right now to create an election swing map. This is different from a usual election map in that it measures differences in winning margins from one election to another. For example, Joe ...
Sebastian Pojman-Malo's user avatar
2 votes
0 answers
36 views

How to colorize hierarchically-ordered polygons?

I have to implement a solution for coloring a lot of polygons that are derived from a hierarchically-ordered dataset. The dataset can be compared to a family tree in terms of hierarchy. Most of the ...
sicadu's user avatar
  • 129
5 votes
3 answers
669 views

Creating nested hex grids in QGIS

I'm looking to replicate the kind of map seen here, where there are essentially multiple hex grids nested inside one another. Author : Kate Berg That example was made in ArcGIS Pro, whereas I'm ...
Matt Houston's user avatar
0 votes
0 answers
23 views

Making line thickness based on the sum of overlapping lines in QGIS [duplicate]

In QGIS 3.22.2 I have used the ORS distribution calculation tool to work out the number of vehicles that go from one origin to multiple destinations. I am trying to represent this number as a line ...
Paul S's user avatar
  • 1
4 votes
1 answer
2k views

Creating symbology based on range of values in QGIS

I would like to create a map in QGIS 3.16.13 where I am able to distinguish between forest cover increase, decrease, and stable forest. My values are between -99 and 100. How do I create a colouring ...
Tammy's user avatar
  • 151
1 vote
1 answer
244 views

Prism-map with QGIS (2.5 D)

I am trying to make a Prism Map with the 2.5 D Renderer with latest QGIS. Unfortunately the map does not look like expected. The prism for the boundary with the highest value looks "inverted"...
Kurt's user avatar
  • 7,107
4 votes
1 answer
374 views

What is the difference for a shapefile line feature length between "Cartesian" and "ellipsoid"

I use QGIS for a hobby project on American historical railroads. When digitizing a quite short section of railroad line, giving a polyline feature in a shapefile, QGIS gives two values for the line ...
Michiel Rademakers's user avatar
4 votes
1 answer
548 views

QGIS: Style polygon outline as a dashed line with an inner gradient

Is it possible to create a polygon outline as a dashed line with an inner gradient (see image #1)? Currently I have a hack job that sort of works (shapeburst fill with a dashed line above in the ...
sidapo_cartisan's user avatar
6 votes
2 answers
867 views

Preventing labels from covering symbols in QGIS 3

In a single point dataset is it possible to get the labels to stop covering the symbols and be placed in a position that has white space automatically (i.e. without using data defined xy positions)? ...
GeorgeC's user avatar
  • 8,238
3 votes
1 answer
706 views

Rendering three-composition raster map with ternary colormap using R

Say there are three raster maps, representing percentages of sand, silt and clay respectively. The three values for each cell are hence summed up to 1. I want to use one raster map to characterize the ...
tunar's user avatar
  • 141
1 vote
2 answers
82 views

Digitizing photographs of a map

Is it possible to digitize the photographs of very old maps, having no co-ordinates. The photographs are exactly like this. If possible, could somebody tell me how to proceed? I have access to ArcGIS ...
Scholar7's user avatar
3 votes
2 answers
49 views

Line cut off (doesn't fit) in map -- any cartographic convention?

Anyone would know if there is any cartographic convention on representing/symbolizing a line that doesn't fit on my layout map? Should I represent it using an arrow at the end.. or something else? ...
santibravo's user avatar
0 votes
0 answers
404 views

How to create a US map in R with separation between states, when using albersusa & plotly?

Does anyone have know how to access the longitude and latitude in albersusa? Currently, I'm working with a choropleth U.S. map in R using albersusa and the plot_geo() function from the plotly package (...
pseudorandom's user avatar
0 votes
0 answers
247 views

How can I draw a vegetation profile on ArcMap or QGIS?

I have two layers: elevation (raster) and vegetation map (polygons). I would like to generate an elevation profile with a line that besides having the elevation form, appears the length of the ...
BAdm's user avatar
  • 1
5 votes
1 answer
763 views

Render Roads in QGIS using z-order like in OpenStreetMap

I am using QGIS with OpenStreetMap data and I am trying to copy the way OpenStreetMap renders the order of their roads using the 'z-order' field. I am very close, I managed to use the layer properties ...
floyd434's user avatar
  • 135
3 votes
2 answers
588 views

Creating singleband pseudocolor ramp displaying colors based on values using QGIS

With QGIS desktop, I'm trying to create a ramp to a DEM using a singleband pseudocolor style. I have created a ramp with 15 different colours and values as well. I can't find the option to apply those ...
hervus's user avatar
  • 51
3 votes
0 answers
323 views

Making bivariate symbol map in QGIS

I am making a bivariate symbol map in QGIS in which, the size of the symbol depends on one variable whereas the color on other. For example, I have taken India data from https://simplemaps.com/data/in-...
rgt's user avatar
  • 107
1 vote
0 answers
495 views

Creating Choropleth Map using points in ArcGIS Pro

As seen in the picture, the purple/yellow points represents yes/no, and the location of the points are based on home locations of the respondents. In ArcGIS Pro I would like to create a choropleth ...
Jessie's user avatar
  • 31
1 vote
2 answers
391 views

Making bivariate proportional symbol map in QGIS

I have data on two characteristics for a particular variable, say volume and quality. I want to plot these using proportional symbol map in QGIS. For Volume, I could plot using: Symbology -> ...
rgt's user avatar
  • 107
6 votes
1 answer
524 views

Is it possible to display all icons and labels but not cover other icons in QGIS?

I've been trying to find a way to automatically distribute icons and labels from different data sources so that they don't cover each other at any scale. The PDF will have the data showing at this ...
GeorgeC's user avatar
  • 8,238
0 votes
0 answers
44 views

What is the size of a geom at a given scale?

I have a dataset with many overlapping grid cells. I would like to represent the cells in such a way that each grid cell is represented with one point. To avoid having the points overlapping each ...
ragnvald's user avatar
  • 3,191
9 votes
1 answer
1k views

Vertically and Horizontally align the labels in multi-column QGIS legends

In QGIS 3.18 (and older versions) I noticed that the first item in a multi-column legend isn't aligned with the items in other columns. I have played with the settings in the Spacing column but can't ...
GeorgeC's user avatar
  • 8,238
2 votes
2 answers
203 views

QGIS 3.16 - I want to make by 6"x9" map a 24x36, but all of the text/layers are tiny. Is it possible to automatically scale all of the layers?

I recently got a freelancing gig and am really excited, but I'm having troubles exporting my map in a different size in QGIS. My client wants a map sized 24"x36", and I have created one that'...
WavesInSpace's user avatar
1 vote
0 answers
35 views

Representing clustered points above 80,000 in map using ArcGIS 10.2.1 in such a way that their labels and points themselves are clearly visible?

I have places of Pakistan which are 85949 in number, I want to display them on a static map in such a way that points and their labels are readable and they don't overlap or map doesn't look messy. I ...
sabahat ali's user avatar
1 vote
0 answers
134 views

Gauss-Krüger system to Unity cartesian Coordinate Conversion

I have to deal with coordinate conversation into my unity (a game engine which uses cartesian co-ordinate) project but I am zero in this field as it is involved math, geometry, and geography with lots ...
Muhammad Faizan Khan's user avatar
3 votes
0 answers
29 views

Adjusting buffer between arrows and both begin and end points separately [duplicate]

I'm currently making a map of the Netherlands in which the flow of student migrations upon or shortly after their graduation is depicted. Here's what I've made so far: I'm getting a bit more pleased ...
Max Muller's user avatar
2 votes
1 answer
1k views

Equal area map projections: Lambert azimuthal or Albers conic?

When making small-scale regional maps on the order of 500-5000 km in extent where an equal-area projection is desirable, which would you prefer, the Lambert azimuthal or Albers conic? I realize this ...
JedO's user avatar
  • 129
0 votes
0 answers
68 views

How Is 4d Cartography Best Applied to Add Value to the Viewer?

I’m about to write my bachelor thesis in Geography with my main focus being GIS. I’m still in the process of finding a good topic. My supervisor and I narrowed it down to 4D cartography and if and how ...
TheKidsWantDjent's user avatar
1 vote
1 answer
92 views

Data from REST service shows symbology for items not on my map

I am using QGIS 3.4 to display eelgrass data from this website: https://geo.wa.gov/datasets/8ef27802b6cf4b61b814c80dd91d6e9e. To get the specific layer I need I use this link to connect to an ArcGIS ...
GBG's user avatar
  • 10k
4 votes
2 answers
570 views

Ceating cross-sectional styled visualisation of multiple layers in map

Is it possible to create a map using multiple layers to visual them in a cross-sectional manner in QGIS, ArcGIS or R? I have attached two examples to illustrate what I want to achieve.
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