Modify EPS Layer Symbol Configuration

Instructions for Use

The application supports importing EPS model data. To improve the display effects of EPS layer data, the Modify EPS Layer Symbol Configuration function is provided. You can use this function to customize the maximum/minimum symbolization scale, graphic display method, color display method, etc.

Function Entry

  • Workspace Manager -> Context menu of EPS dataset -> Add EPS to Current Map/Add EPS to New Map.
  • Workspace Manager -> Context menu of dataset -> Add to Current Map/Add to New Map. (If the dataset contains a SymbolInfo field, it will be automatically recognized as EPS data, and the EPS dialog will pop up.)
  • Layer Manager -> Context menu of EPS layer -> Modify EPS Layer Symbol Configuration. (Note: This entry allows custom symbolization configuration for one or multiple layers in the map.)

Parameter Description

In the pop-up EPS dialog, users can customize the layer symbolization configuration. The parameters are described as follows:

  • Map Scale: Modifying the scale will change the size of symbols, affecting the display size of graphic symbolization.
  • Maximum Symbolization Scale: Sets the scale for symbol display. For example, if set to 3000, it means a scale of 1:3000. When the map scale is larger than 1:3000, the EPS layer style is displayed; when smaller, it displays as ordinary symbols.
  • Minimum Symbolization Scale: Sets the scale for symbol display. For example, if set to 2000, it means a scale of 1:2000. When the map scale is larger than 1:2000, it displays as ordinary symbols; when smaller, the EPS layer style is displayed.
  • Symbolization Information Field Name: Displays the field used for symbolization. This field is of binary type and stores the data stream of objects. The EPS style is displayed based on this field.
  • Graphic Display Method: There are two layer display methods: Skeleton Line Display, which only shows simple point, line, and area graphics; and Symbolic Display, where all EPS objects are displayed with symbolization.
  • Color Display Method: EPS uses two colors during drawing: one for the symbol color and one for the entity object color. Therefore, the color display method is divided into three types: With Entity displays colors according to the EPS entity object color; With Symbol displays colors according to the EPS symbol color; and Set allows users to specify the display color of the EPS layer using the Color selector below.

About EPS Data Layers

EPS (Electronic Platform Survey System) is a series of software independently developed by Beijing Tsinghua Sunway Company for the surveying and geographic information industry. It integrates CAD (graphic drawing platform) technology and GIS (Geographic Information System) technology, using a database as the core to associate graphics and attributes as one, supporting the informatization transformation of surveying results from the production source.

Currently, there are two types of EPS data:

  1. EPS project data files (with the extension *.edb): Files storing graphics and attribute data, supporting migration to SuperMap (via the "Import EDB" migration tool).
  2. FileGDB file geodatabase: Supports direct opening in SuperMap.

Since data produced by the EPS platform (hereinafter referred to as EPS data) associates graphics and attributes as one, after loading the data into SuperMap, some of SuperMap's cartographic capabilities are not applicable to EPS data layers, as detailed below:

Layer Style

In EPS data, graphics and symbolic attributes are associated as one, using specific fields to store the symbolization style information of each object:

  • After migrating *.edb format EPS data to a SuperMap data source, the "Symbolization Information" field stores the symbolization style information of objects.
  • FileGDB format EPS data uses the "symbolinfo" field to store the symbolization style information of objects.

The fields storing symbolization style information are of binary type, and their content is written by the EPS platform. Modifying these field values in SuperMap is not supported.

SuperMap layer style settings are not applicable to EPS data layers.

When adding EPS data to a map for display, users will be prompted to configure settings such as the minimum visible scale and maximum scale for the EPS data layer. Within this range, the EPS data layer will display objects according to the symbolization style information in the attribute table; otherwise, the SuperMap default style will be used.

Layer Properties

Settings in SuperMap layer properties that affect object display style (e.g., layer transparency, blend mode, scale with map, anti-alias) are not applicable to EPS data layers.

Layer Editing

SuperMap does not support feature editing operations for EPS data layers.

Thematic Map

SuperMap does not support creating thematic maps for EPS data layers.

Map Properties

Maps containing EPS data layers in SuperMap do not support map coordinate system settings and dynamic projection.

Settings in SuperMap map properties that affect object display style (e.g., vertex color, fixed symbol angle, fixed text direction, and angle) are not applicable to EPS data layers.

Attribute Table Editing

SuperMap supports adding property fields to EPS datasets but does not support modifying EPS data-specific fields, such as fields storing symbolization style information.

Map Tiles

Maps containing EPS data layers in SuperMap support outputting raster tiles, but when outputting vector tiles, the EPS layer style cannot be converted into vector tile style descriptions, meaning the style cannot be output.

Related Topics

Import EDB