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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0answers
38 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
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2answers
82 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. ...
0
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1answer
37 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?
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1answer
55 views

How to display raster attributes by default?

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 ...
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0answers
37 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, ...
4
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1answer
207 views

How is a geographic heat map different from a colored statistical thematic map?

From Wikipedia, A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors. Apparently, a geographic heat map is only one ...
5
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1answer
214 views

How to remove trailing zeros from QGIS Graduated Style Class labels?

I'm sure I've seen a solution to this before but now I can't find it. When using the graduated fill style in QGIS I get lots of trailing zeros in the labels. This makes my legends look messy in the ...
1
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1answer
140 views

Thematic map with points QGIS

I would like know how can I make a thematic map (soybean production) with density points. In this case the points are randomly plotted in a municipality area. Please, see an example in the image:
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2answers
189 views

Enable dynamic layer with Arcgis 10

I'm creating a flexviewer application (arcgis API for flex 3.4) with application builder. I'm new with flexviewer. I want to add thematic widget. I was able to add the widget. But when I want to run ...
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1answer
48 views

resampled thematic map accuracy

I've generated a map of ecoregions based on some environmental data using a semi-supervised classification where I combined a statistical clustering with random forests to generate my map. I created ...
0
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1answer
125 views

MapInfo Thematic Mapping - All other values?

Relatively quick question here, how do I go about adding a style for all other values using individual value thematic mapping? Thanks, Alan
7
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1answer
211 views

Ternary Legends - how to represent in Arc

I've got a composite image built up from Red Green and Blue composite colours. Each channel represents the differing concentration of a different variable in each location - with 0 being the lowest ...
12
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1answer
3k views

How to create an attractive choropleth map in R?

I've been experimenting with choropleth mapping techniques in R, having reaped the benefits of ggplot2 for creating beautiful graphs within a powerful data analysis package. When it comes to mapping ...
0
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0answers
174 views

Is it possible to automatically create categories with mapserver?

I have a mapfile connecting to a postgres/postgis database. To create a thematic map I can set a class item and a number of classes, for example: CLASSITEM "aantal" CLASS NAME "0" ...
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0answers
22 views

Retaining original thematic colors in a USA source shapefile [duplicate]

Possible Duplicate: Adding Layerfiles (.lyr) to Qgis New to QGIS and need a lot of help! I am using QGIS with MAC - I have downloaded a USA thematic map but when I open it in my system it ...
2
votes
1answer
935 views

Create new polygon layers from postcodes latitude & longitude

First at all, I want to say that I am geocoding enthusiastic but have no formal background on GIS. I'll do my best to use the right wording and make myself clear what I am striving for. Also the only ...
3
votes
1answer
141 views

How to find features with NULL values?

I have a layer to analyze and I want to create a thematic map with rule based feature. There is a strange behaviour. I want to find all objects with no data (NULL). All empty objects. The zero value ...
3
votes
1answer
2k views

How can GeoJson polygons be colored programmatically using OpenLayers?

I'm experimenting with dynamically setting the color values of a geojson polygon. In my geojson file, there is an attribute for each polygon called pop_den. I am trying to update the fillcolor of the ...
5
votes
1answer
610 views

Is dynamically generating Choropleth maps a solved problem?

I am trying to work out what mapping tools I would need to use to dynamically create Choropleth maps from our data. I am working on a project where the backend is a big database of statistics, and ...
1
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1answer
112 views

Different colours for touching lines on MapInfo?

I am creating maps for surveyors showing different sections of roads. The start and end points need to be clearly visible so I am using a Region IndValue thematic map. However, sometimes when an ...
5
votes
1answer
306 views

How to Make a Thematic Map with ORACLE using MapXtreme?

I want to make a thematic map with Oracle source longitude and latitude values. I have made thematic maps with tab file source. Part of the code looks like this: ...
-1
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6answers
402 views

Which program that merges excel data onto shapefiles is easiest to use?

some options for merging looks like fusion tables, vizmaps, and these 2 http://mapbox.com/tilemill/docs/guides/joining-data/ ...
0
votes
1answer
480 views

How to layer statistics from Excel onto a map?

Would another free app or program be better and easier to do this than mapbox.com ? I simply want to layer census 2010 data by shading areas onto a map like on theatlanticcities.com/posts/map/ & ...
1
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1answer
116 views

Thematic maps on Non Spatial Data in MapGuide

I need to create the thematic map on a polygon layer. But the data is not available in the layer; I am using Postgres database for that. It means I need to create the themes on layer using non spatial ...
2
votes
0answers
134 views

Setting border-style to 'no pen' using QgsGraduatedSymbolRendererV2

I am developing a QGIS plugin that, after a series of inputs, will produce a thematic map using the QgsGraduatedSymbolRendererV2. Because the polygon are very small, the boarders make it such that ...
9
votes
2answers
857 views

How do you choose the classifications on choropleth maps?

I find myself more and more struggling over defining break points when displaying choropleth (aka thematic) maps to view by others. Does anyone have any suggested references that help guide, both how ...
9
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7answers
878 views

How to automatically set polygons borders to improve map readability when rendering thematic maps?

When mapping an value as a color to render a thematic map the objects borders can alter the map readability a lot. For example in this thematic map of the US counties with black borders: There are a ...
4
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4answers
1k views

Multi-Colored Polygon in Thematic Map

I have to make a thematic map with an attribute table with duplicated features but different attributes. See below: FEATURE ATTRIBUTE ------------------- 1 bl 1 gr 2 gr 2 ...