Questions tagged [thematic-map]

A thematic map is a type of map or chart especially designed to show a particular theme connected with a specific geographic area.

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Dynamic Category thematic map

I am working in QGIS 3.8.3-Zanzibar on a shapefile with polygons. I am zoning by selecting the polygons and giving each group a different number (a zone code). In order to visualize it, I have a ...
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How can I edit an existing thematic shapefile composed of contiguous polygons in QGIS

I cannot edit an existing thematic shapefile layer composed entirely of contiguous polygons. I created the layer many years ago using ArcGIS Desktop; the themes represent the depth of water in a ...
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-3 votes
1 answer
288 views

Importing map found on the Internet to QGIS [closed]

I am new to QGIS and I have learned some of the basics. Now, I have found a Soil Map of Germany I want to work with on the internet. My tasks now are as follows. To reduce the size of the map with ...
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67 views

How to do different thematic analysis to same GeoJSON in Leaflet

In order to do several Thematic Analysis to my GeoJSON Polygon file, I have to load each time the duplicate version of it, in order to have that color thematic of the specified attribute (This is not ...
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2 votes
1 answer
196 views

GeoServer create thematic from point to area

I have some point data like first image. I want create thematic with this data. But I can't create GeoServer style like this. You see data on map like this: How can i create style which i see ...
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7 votes
1 answer
703 views

Filling or splitting polygons proportionally based on variables using QGIS?

I want to divide each country into three separately coloured areas, like this: The proportions of the three coloured areas must based on three columns of attribute data in the country shapefile's ...
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1 vote
1 answer
621 views

Remove Theme from MapInfo TAB file

I have been supplied with a MapInfo TAB file and when opened in MapInfo 15.2 (64bit) the layer is displayed along with a Thematic Theme Layer. The symbology generated by the Thematic Theme no longer ...
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2 votes
0 answers
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Scholarly articles that compare and contrast different thematic map types or discusses what thematic map types are better in certain situations? [closed]

I'm writing a paper that involves some GIS work that I've done and as part of that I need to analyse an existing cluster map and explain why a heat map would be a better solution. I can provide plenty ...
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1 vote
2 answers
370 views

How to display Values as Labels in Thematic Map - Mapinfo

I was able to produce the Thematic Map for Agricultural Production for the various boundaries. How can I display the production value associated with each polygon as a label (to make it look like the ...
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3 votes
1 answer
40 views

Thematic Map from a STATCAN Shapefile [closed]

I want to create a thematic map of my data. I downloaded a shapefile from Statistics Canada website displaying the various agricultural regions. I have data in Excel How do I add this data and match ...
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1 vote
0 answers
280 views

Attribute table shows histogram/pixel count for a thematic raster image, but on enquiring, every pixel's value is zero

I have a thematic raster image containing 18 land use classes (like built-up, water bodies, plantations, forest, etc.). When I display this image in a GIS application (Arcmap/Erdas IMAGINE), the map ...
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3 votes
1 answer
247 views

Using map theme on qfield?

I created two presets on qgis and they work very well when switching from one to another, yet on qfield and when I choose a map theme some layers are not displayed especially those that have a ruled ...
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1 vote
0 answers
98 views

Using excel info to create thematic map

So, I have an excel spreadsheet with information regarding people within a certain zip code. I basically need to make a map that shows the amount of people within each zip code either using dots or ...
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1 answer
185 views

Placing value on top of bar chart thematic map using MapInfo?

Is it possible to place the value on top of each bar in a bar chart thematic map in Mapinfo? This is how I did it so far: I wanted to show a value per zone (the amount of trips generated in one area) ...
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9 votes
2 answers
522 views

Is there a "clone view" functionality in Qgis like in MapInfo

I am currently working in Qgis (2.18.11) and I would like to view mi map window duplicated so I can represent a thematic map with different values in each window and compare both. I usually do this in ...
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  • 756
2 votes
3 answers
565 views

Rules within thematic maps in MapInfo

Is there a way to set specific rules when creating a thematic map in MapInfo? I would like to exclude the polygons that have too many of the items I want to represent from the thematic map (something ...
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3 votes
2 answers
328 views

Identify only visible features in QGIS

I have a thematic map layer Rekryterare in QGIS. The layer is defined as identifiable. The question is how can I make the thematic categories of this map layer unidentifiable when they are invisible ...
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  • 153
1 vote
1 answer
1k views

How to use thematic layer for supervised classification in eCognition

I'm classifying vegetation in eCognition. From ArcMap I already have a shapefile with training polygons that I would like to use for this but so far I was only able to insert this as a thematic layer ...
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1 vote
0 answers
27 views

Thematic Graduated Bar Chart from polyline

I have a road broken into 10m sections, each section has a road condition score, I was hoping to create a bar coming of each section based on that condition and also color them based on a categories e....
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4 votes
2 answers
953 views

Proportional Coloring within polygon for multiple variables

I'm new to QGIS and I am doing some demographic analysis of Ethiopia. I have a vector map with each of the country's administrative zones: Within the attribute table, I have data for religious ...
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10 votes
2 answers
1k views

How to show labels exactly around a circle in QGIS?

I found an interesting way of proportional symbol mapping and labeling, I think this was made by Adobe Illustrator but I couldn't find out if it can be done in QGIS. What I am interested in the most ...
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1 vote
1 answer
208 views

How to access to the underlying grid table behind Mapinfo's Grid Thematic map?

I created a grid thematic map using "Mapinfo - Map - Create Thematic Map" function. Now I want to know the distribution of the data from the grids. But the "Browse Table" option is not functioning ...
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2 votes
1 answer
436 views

Using grid cells and point data to calculate encounter rates across surveying area?

I am fairly new to GIS. I am currently evaluating wildlife sightings across transect lines and want to calculate the occurrence of encounters, per area surveyed. So essentially look at encounter ...
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1 vote
0 answers
236 views

Georeferencing postcodes into bubble map with Cartodb

I have recently discovered Cartodb and I am trying to create a bubble/thematic map of postcodes. I have a csv document with one column of postcodes from around the UK. I have uploaded the dataset and ...
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6 votes
3 answers
2k views

Is there an automatic way to create a diverging colour scale centered around zero?

I'm trying to plot a map of the residuals of a linear model. My residuals centre around zero and can obviously go in either direction. Is there an easy way to apply a graduated colour scale to these ...
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  • 1,633
1 vote
1 answer
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Grid thematic map in Mapinfo

I have a tab file with the contour lines for an area, and also a tab file with the land polygon. Now, I'm following a tutorial written by a colleague a couple years ago, where a thematic map is ...
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8 votes
5 answers
3k views

Color ramp resources other than Color Brewer?

I am looking for more resources on color theory in cartography. When to de-saturate a color? Or if you start with one color, how do you create a ramp from it? RGB or HSV? I can hack at it and come up ...
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1 vote
1 answer
366 views

Tweaking some aspects of OpenLayers 3 output using QGIS2Web

I have made a thematic map in QGIS and exported it to OpenLayers 3 format using QGIS2Web plugin containing 4 layers. I need to tweak the following things if possible: I want to remove check boxes and ...
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6 votes
1 answer
681 views

Representing data on thematic map in only two colors in qgis

I am very new to qgis, and i am doing a project on representing child immunization on thematic maps. I want to represent the data which is even number in one color and odd number data in another ...
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  • 97
-1 votes
1 answer
1k views

Locating and adding state layers to a QGIS map

If I wanted to add layers for a state (Indiana) in a program like QGIS so I could produce several maps (Infrastructure, Water Resources, Mineral Resources, and HAZMAT concerns), how would I locate and ...
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2 votes
1 answer
148 views

Dashes instead of "to" in mapinfo thematic legend

The thematic legends for ranges are automatically set to the word "to", for example "10 to 20" "20 to 30" etc. I need to write it with a dash instead: "10-20", "20-30". Can I change the default ...
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-1 votes
1 answer
464 views

Seeking free tool to make choropleth map with administrative borders?

I have a numeric table for some administrative division like county, state, province, oblast. Is there a free tool that I can supply with my table and get a choropleth map?
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  • 415
1 vote
1 answer
5k views

Creating thematic map where individual points are basically grid in MapInfo?

I want to plot a heat map which shows the different usage in different areas. But the thing is, in my original dataset, the data got truncated, which means that each point represents a small area ...
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2 votes
1 answer
124 views

Creating fishnet from thematic polygon data?

I need to create a regular grid containing attributes from other thematic data from ecological data. I am in effect creating a homogenous polygon raster and adding information from another dataset ...
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7 votes
3 answers
2k views

Creating disease risk map in QGIS? [closed]

I would like to create a risk map using RFE Data and Tiffs but now I realised that I actually have no idea how. I have dowloaded .Tiff(Region), .hdr and .bil(Rainfall/RFE) files from the USGS page, ...
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  • 391
1 vote
1 answer
324 views

Thematic map using date field in ArcGIS [duplicate]

I need to create a thematic map for time intervals (ex. 1/1/1920-31/12/1929). To every polygon corresponds a date (from a date field) and I need them to be coloured depending in which interval they ...
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  • 161
1 vote
3 answers
2k views

Creating thematic map in ArcMap?

I want to create a thematic map in arcmap using the fields NAME and NOTES for 3 categories of polygons: where the name cell is null where the name cell is filled where the name cell is null, but it ...
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  • 161
1 vote
0 answers
114 views

Overviews for thematic raster maps

I have a landuse raster map with integer classes (1:agricultura, 2:pasture, etc). I'm trying to publish it through GeoServer and I'd like to use image overviews to speed things up. I tried gdaladdo ...
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  • 2,256
1 vote
1 answer
281 views

openlayers 2 coloring a polygon layer based on a database ( postgresql ) table that is different from the attribute table of the layer

I have trouble coloring the polygons in my layer based on the values in a certain field in another table in my postgresql database that is different from the attribute table of the layer itself. Is ...
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2 votes
1 answer
287 views

Making thematic layer 50% translucent in MapBasic?

I'm trying to make this enhancement to an old program written by another author. I was able to make the layer translucent prior to Shade Window command, but its not working. Here is the code: Add Map ...
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3 votes
0 answers
155 views

Displaying directional bandwidths in QGIS

I have a traffic model and want to display the results in QGIS. I have a shapefile for the road network and can easily annotate the flows onto this. However, I want to display the information as ...
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2 votes
1 answer
10k views

Creating thematic map where individual values are displayed as colors and range values are displayed as shades of those colors?

I am trying to create the following thematic map using Mapinfo professional: I have point data that is displayed as a grid. I need to create a thematic map where I show two fields - one representing ...
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2 votes
1 answer
305 views

QGIS Print Composer - Display Symbols for Empty Classes?

I am working on a map of mortality rates for several racial/ethnic groups and I have created custom classes to encompass the rates instead of the QGIS classes created through its various modes. This ...
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3 votes
1 answer
585 views

Custom range value and colour thematic in mapbasic

I'm working on a tool to help my work. I managed to make a thematic, but the range of values and colors appear automatically. Here is the code: Dim fRangeLimitsArray() As Float Dim bBrushStylesArray()...
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2 votes
1 answer
358 views

PostGIS Unknown colormap keyword

I'm working with thematic maps with ST_ColorMap function smoothly until I try to create my own thematic map(colormap). WITH canvas AS ( SELECT ST_Raster( ST_SetSRID(ST_Extent(...
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1 vote
0 answers
151 views

Appropriate reference system for small-scale mapping of the Middle East [duplicate]

I want to create a thematic map of the Middle East that displays certain historic places and regions on a small-scale map (between 1:6.000.0000 and 1:12.000.000). The map has to center the boundary ...
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1 vote
1 answer
93 views

Thematics in Mapinfo - multiple intervals from same table?

I´ve got a table where I want to thematize intervals of values like between 0.1 - 1.0, 1.0 - 2.0 and etc., but I´m almost sure that´s not possible, whithout splitting up the table to multiple tables, ...
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  • 723
2 votes
1 answer
4k views

How to create QGIS theme map?

I need to make theme map using diagrams like in MapInfo, can I do it in QGIS? Or can I create a surface using attributes?
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  • 523
7 votes
1 answer
550 views

Graphically depict statistical difference between thematic rasters

The graph shows a regression between two raster datasets with classified tree canopy cover: class 1 = 0-10%, class 2 = 10 - 20% ...class 6 = >60% (Figure 1, Figure 2). The spatial resolution for ...
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2 votes
0 answers
113 views

Thematic mapping [closed]

What is the best way to develop thematic maps? I would like to generate pie charts and fill polygons with different colors depending on a parameter value. I'm working with ExtJS 4.2 and OpenLayers.
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