proj地理坐标系投影转换v1.0.0

A GIS analyst needs to convert a dataset stored in EPSG:4326 (WGS84) to EPSG:3857 (Web Mercator) for tiling on a web map. The skill guides CRS selection and warns about axis order and unit differences to avoid display distortion.

An engineer working on a local construction project must transform coordinates from CGCS2000 to a local UTM zone for accurate distance and area calculations. The skill recommends appropriate projected CRS and cautions about datum shifts.

A data scientist needs to merge GPS data (WGS84) with POI data using GCJ-02 or BD-09 offsets in China. The skill explains these offset systems are not standard CRS and advises on lossy conversion and legal restrictions.

A GIS specialist combines datasets from different sources (UTM, CGCS2000, WGS84). The skill helps identify source and target CRS, highlights differences in units and axis order, and recommends EPSG:4326 for storage interoperability.

A researcher plans buffer and area analysis on animal movement data. The skill advises choosing a local projected CRS over Web Mercator to preserve metric accuracy and avoid distortions.

Offer a cloud-based API that automatically detects and reprojects user-uploaded data, leveraging the skill's workflow for CRS identification and transformation recommendations.

Provide CRS expertise as a premium add-on to GIS consultancy, helping clients avoid costly projection mistakes in large-scale mapping projects.

Create targeted tutorials and certification on coordinate systems for GIS professionals, using the skill's structured comparisons and rules.