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Geographic Information Systems

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.

73 questions
info Newest Frequent Votes Active Unanswered
3
votes
1answer
45 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 ...
1
vote
1answer
121 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 ...
2
votes
0answers
15 views

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 ...
1
vote
1answer
105 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 ...
3
votes
1answer
32 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 ...
1
vote
0answers
98 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 ...
3
votes
1answer
133 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 ...
1
vote
0answers
60 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 ...
0
votes
1answer
120 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) ...
9
votes
2answers
276 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 ...
2
votes
3answers
290 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 ...
3
votes
2answers
145 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 ...
0
votes
0answers
69 views

Any way to join multiple categorical rasters, and retain their individual attributes?

I need to combine several different thematic rasters who's values code for their specific attributes. The rasters are spatially extensive (a whole continent) and in some cases have quite a few unique ...
1
vote
1answer
802 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 ...
1
vote
0answers
23 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....
3
votes
2answers
325 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 ...
10
votes
2answers
522 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 ...
1
vote
1answer
149 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 ...
2
votes
1answer
330 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 ...
1
vote
0answers
211 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 ...
5
votes
3answers
694 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 ...
1
vote
1answer
1k views

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 ...
7
votes
5answers
2k 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 ...
1
vote
1answer
251 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 ...
6
votes
1answer
372 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 ...
-1
votes
1answer
510 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 ...
2
votes
1answer
112 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 ...
-1
votes
1answer
344 views

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?
1
vote
1answer
4k 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 ...
2
votes
1answer
97 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 ...
7
votes
3answers
1k 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, ...
1
vote
1answer
236 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 ...
1
vote
3answers
1k 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 ...
1
vote
0answers
91 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 ...
1
vote
1answer
202 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 ...
2
votes
1answer
242 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 ...
2
votes
0answers
101 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 ...
2
votes
1answer
9k 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 ...
2
votes
1answer
210 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 ...
3
votes
1answer
496 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()...
2
votes
1answer
255 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(...
1
vote
0answers
83 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 ...
1
vote
1answer
68 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, ...
2
votes
1answer
3k 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?
7
votes
1answer
423 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 ...
2
votes
0answers
108 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.
2
votes
2answers
746 views

Flannery compensation in Leaflet JS

I'm creating a bubble map using Leaflet JS. Everything is working smoothly (LeafletJS is awesome!) but now I'd like to try flannery compensation on the bubbles. I can't find the math anywhere though. ...
2
votes
1answer
395 views

MapInfo Thematic mapping - line width based on a field

I want to apply thematic mapping to a layer in MapInfo with varying line thicknesses based on a float column. Is this possible?
2
votes
1answer
245 views

How to display raster attributes by default in ArcGIS for Desktop?

I have a 4-bit thematic raster image with a color map from white to dark blue (Figure 1). The values 1 - 6 represent tree canopy cover at various breakpoints. I also created a raster attribute table ...
1
vote
0answers
127 views

Map Info: Thematic Mapping Symbols part printing

I have produced a series of thematic maps for graduated housing figures, using a symbol which I customized, in three different tables displayed in a layout. This looks fine in the map window, ...

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