The first step in chart data production is Data Preprocessing, which aims to organize and standardize multi-source data to establish a solid foundation for subsequent workflows. Through data preprocessing, unified management of various data formats (vector, raster, sounding points, etc.) can be achieved, ensuring compliance with electronic chart standards (S-57, CJ-57, IENC). For instance, the multi-source data integration feature supports over 100 data formats. Combined with coordinate transformation and type conversion, it can transform complex data into standard GIS formats, laying the groundwork for subsequent chart group creation, data processing, and sharing.

Meanwhile, leveraging the 1000+ tools provided by SuperMap iDesktopX GPA (Geoprocessing Automation), you can build reusable data preprocessing workflows to achieve standardized data processing.

This chapter covers the following content:

• Generate Range: Explains how to create water or land surface data from shoreline data, providing fundamental support for constructing geographic ranges in nautical charts.
• Generate Isobaths: Describes generating underwater terrain contours from sounding data and water areas to visually represent depth distribution.
• Generate Depth Zone: Demonstrates dividing water depth ranges using existing isobath data to create intuitive depth zone distributions, providing critical support for navigation and marine research.
• Update SCAMIN: Details how to automatically adjust SCAMIN values for chart features based on current editing scale, ensuring proper display within appropriate scale ranges and enhancing chart data consistency and display standards.