shawnbot/topogram

Feature? Absolute scaling of cartogram regions

Open

#21 创建于 2015年7月19日

在 GitHub 查看
 (3 评论) (0 反应) (0 负责人)HTML (321 star) (133 fork)batch import
help wanted

描述

Would it be possible for the cartogram to scale features absolutely as well as relatively? Only the latter seems to occur at the moment that is, total area seems to preserved as U.S. states are scaled against one another. For example, with the dataset being presented in the attached image, the US should being nearly twice as large as it actually is, yet the cartogram is roughly the same size as the unmodified map. usef2010cartogram-scalingref

贡献者指南

技术栈
javascripthtml
领域
frontenddata
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
4
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
over 1 week
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
mostly clear
前置要求
Basic knowledge of D3.jsUnderstanding of cartogram algorithmsFamiliarity with TopoJSON
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
15
研究方向
The current cartogram implementation in topogram likely computes relative scaling based on the total area of all features. To implement absolute scaling, modify the scaling logic to allow features to scale proportionally to a given value (e.g., population) without preserving total area. Look at the main cartogram function in the repository, possibly in index.js or similar, and check how the area of each feature is calculated and adjusted. Review D3.js documentation on path generation and area calculations. Consider adding a new parameter for scaling mode (relative vs absolute) and adjusting the algorithm accordingly.