SuperMap Technical Documents
Introduction to Thematic Mapping in SuperMap

In SuperMap, you can create , modify , delete and export thematic maps. Also, you can Save Thematic Map as CAD .

Here, we mainly deal with the following five topics:

        ↓ 1. Common parameter settings

        ↓ 2. Multi-style and single-style thematic maps

        ↓ 3. Display different thematic maps simultaneously

        ↓ 4. Create thematic maps for different layers

        ↓ 5. Save thematic maps as CAD

1. Common parameter settings

In SuperMap, the following are some common parameters needed to be set in each of the seven types of thematic maps: Value Field, Filter Expression, Maximum/Minimum Scale, Import/Export.

Value Field and Filter Expression:

Maximum/Minimum Scale:

You can set the maximum and minimum map scale precisely in the following two text boxes:

You can also set the maximum and minimum map scale from the Layer Visible Scale menu by right-clicking the target thematic map in the Legend manager, although this method is not as precise as the method mentioned above.

Layer Visible Scale:

Import/Export:

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2.Modify style

Of the seven types of thematic maps, there are one or more thematic labels in Unique Value, Ranges, and Graph thematic maps, while the other four types do not have such thematic labels. We call the former group of maps multi-style thematic maps, and the latter group of maps single-style maps.

Multi-style: In multi-style thematic maps, we can set the color, symbol, or pattern for each different field value (in Unique Value map), range (in Ranges map), or field (in Graph maps). These maps appear more colorful and full of variety. You can modify the color, symbol, or pattern for one field value at a time or Modify style for more field values at the same time in multi-style maps.


Single-style: In single-style thematic maps, you can select only one field and set only type of symbol or pattern for the values in the field.

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3. Display different thematic maps simultaneously

In SuperMap, some types of thematic maps can be created and displayed in the same layer simultaneously. The following table lists whether two types of thematic maps are allowed to be created and displayed in the same layer, where "N" indicates "Not allowed".

Type

Unique Value

Range

Graduated Symbol

Dot Density

Graph

Label

User-defined

Unique Value

N

N

 

 

 

 

N

Range

N

N

 

 

 

 

N

Graduated Symbol

 

 

N

 

N

 

 

Dot Density

 

 

 

N

 

 

 

Graph

 

 

N

 

N

 

 

Label

 

 

 

 

 

N

 

User-defined

N

N

 

 

N

 

N

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4. Create thematic maps for different layers

In SuperMap, you can create thematic maps for both vector and raster datasets. For vector dataset, you can created thematic maps for all types of layers except text layers. For raster dataset, you can created thematic maps for DEM and GRID layers.   The following table illustrates which type of  thematic map is applicable to which types of layers:

Thematic map type

Layer type

Point/3D Point

Line/3D Line

Region

CAD

Route/Network

TIN

DEM/GRID

Unique Value

 

 

Range

 

Graduated Symbol

 

 

Dot Density

 

 

 

 

 

 

Graph

 

 

Label

 

User-defined

 

 

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5. Save thematic maps as CAD

In SuperMap, a thematic map can be saved as a CAD dataset, in order to save the styles set for the thematic map. For extensive information on this, please see Save Thematic Map as CAD  .

You can one or more thematic maps as a CAD dataset. In most cases, the number of objects in a saved CAD dataset is determined by the number of objects in the source layer and the number of thematic maps displayed in the current map window, that is:

Number of objects in CAD = Number of objects in source layer * Number of thematic maps displayed

But, when a Label thematic map with back shapes set for the labels is saved into a CAD dataset, the back shape set for each label will be an individual object in the CAD dataset. So in this case the formula above should be changed to:

Number of objects in CAD = Number of objects in source layer * (Number of thematic maps displayed + 1)

Take the map below as an example. The number of objects in the source region layer is 6, the number of thematic maps displayed is 3(Unique Value, Label, and Dot Density thematic maps),and in the Label thematic map each label has a back shape, so  if we save the current map into a CAD dataset, the number of objects in the CAD dataset will be 24.

The objects in the CAD dataset could be simple objects or compound objects.

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