CesiumGS/cesium

Add exportKML support for entity instances with Elipse graphics

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#9,344 opened on Jan 26, 2021

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 (2 comments) (1 reaction) (0 assignees)JavaScript (11,758 stars) (3,324 forks)batch import
category - entitygood first issuetype - enhancement

Description

This pull request - #7921 added exportKml function to entity instances with Point, Billboard, Model, Label, Polyline and Polygon graphics. It would be useful if this could be expanded to include Elipse graphics as well

Contributor guide

Tech stack
javascript
Domain
dataapi
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaScriptCesium entity APIKML export
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75
Research direction
Refer to PR #7921 which added exportKml for Point, Billboard, etc. Study that implementation to understand the pattern. Investigate Cesium's EllipseGraphics class and how its properties (e.g., semiMajorAxis, semiMinorAxis) map to KML elements. Check the KML specification for representing ellipses (e.g., using a Polygon with coordinates or a custom geometry). The main file to modify is likely Source/DataSources/exportKml.js or similar. Discuss any questions in the issue comments.