thematic map


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thematic map

(Data West Research Agency definition: see GIS glossary.) A map that displays the spatial distribution of an attribute that relates to a single topic, theme, or subject of discourse. Usually, a thematic map displays a single attribute (a "univariate map") such as soil type, vegetation, geology, land use, or landownership. For attributes such as soil type or land use ("nominal" variables), shaded maps that highlight regions ("polygons") by employing different colors or patterns is generally wanted. For other attributes (like population density - a "metric" variable), a shaded map in which each shade corresponds to a range of population densities is generally wanted.

Thematic maps are used to display geographical concepts such as density, distribution, relative magnitudes, gradients, spatial relationships and movements. Also called geographic, special purpose, distribution, parametric, or planimetric maps.
References in periodicals archive ?
From the thematic map (Figure 3a) it is possible to realize the distribution of the number of parking spots according to the divisions adopted for this research.
The paper is organized as follows: Section 2 presents a background on maps and analyzes the pros and cons of the most used thematic maps. Section 3 presents Brazil's geography and establishes the requirements to a new thematic map using ENEM data.
For 2012, the mean value was 7.29 L [plant.sup.-1], so that through the generated thematic map, there are large regions on the left and right side of the area that show yield close to zero.
GI domains with a frequency percentage equal to or greater than 10% were Satellite Image (24.1%), Natural Disaster Thematic Map (13.6%), and General-Purpose Map (11.7%) (Figure 2(a)).
By overlapping the information from all the thematic map final scores are allocated, as shown in Figure lb.
Later, three interpolation methods (Radial Basis Functions (RBF), Inverse Distance Weighted (IDW), and Ordinary Kriging (OK)) were checked for their accuracy and the K-factor layer (thematic map) was created using the most accurate method.
Figure 5 shows the thematic map of the thematic dataset "Aerial photogrammetric data." We consider as isoreliability values the central values of the TFN formed in the final string.
205/09/1159 "Intelligent system for interactive support of thematic map creation", which was implemented from 2009 to 2011.
With these studies in mind, a clear gap exists in the literature concerning the interpretation and testing of thematic map symbols in a whole-map context, particularly with regard to the recognition of spatial patterns.
The visualization can be either a thematic map of the network, for clear graphical interpretation, or a detailed tabular report conveniently provided directly in the Pipe Renewal Planner dialog.
(13) By the 1850s, this type of thematic map had become commonly used to explain not just the incidence of disease in England, but also crime, illiteracy, poverty, and sanitation.
1 is acquired through WMS (Web Map Service) system comprising client and server application components integrating in-situ and satellite data with numerical modelling for thematic map products able to produce complex mapping, either for basic or for assessment user procedures.