kkk-kppi commented on issue #18975: URL: https://github.com/apache/echarts/issues/18975#issuecomment-2058163719
> > > Is there any way to convert lng/lat coordinates into x/y coordinates有没有办法将 lng/lat 坐标转换为 x/y 坐标 > > > > > > Yes, provided that the geographic coordinate system used for drawing the SVG map is WGS 84. In my [Demo](https://echarts.apache.org/examples/en/editor.html?c=geo-svg-scatter-simple&code=PTAECMHsFcDsBMCWsDmFIA9TNAGwIYAuwuqAULpLgKYBmhoAvKANoBsAzADSgC0ATAFYAdGwCM_ALoBuMtAAOAJ0QoAFg2bsA7MP7itPXhN1iZZeEXwBnahtABvMqFBIAttVhXEkTwC5WAOSw-O4BPAEEhGGgEagBklxOoFYwigDG1P4sSc4sAQBK1ACeANYAVvgAbgC3JdFsACzCYhwAnK1srYb8YsKtDVqtABxaCTmBAGr4uASw1Fb1ImKtHA2CDYZiTYIcbGx6Y865AQDKhPi0F9Qz9U0NWw2dm01Dgvz8AAwNh0d5ABLQKxVRB1Hh7YRfLb8TY6DgcLQND6jRJHQKUGj0aLouiEFgfBJ4Kg4limH7HBTKNRRHgUlTqPEE2lUkmSSRJNkAX1kAHdEPBCKomKAxENVtJnKpqHS7Fshq1xaAQKAThMAOIuRDuTzeTxkVRpIWS6WK0AACiZ9PxfEJGNx-IAlOKlbRIIo8EQyNyDcxefzBWBzUppSzrdj6CzHYqwC63aQUGQrPwhSwzBZzjZCMIUtB0tRhK58PJTaaMPamAA-BxJRPCeSA1Sm7KojAMlFHACyRFUwnw4CsJZDvFAFrtkjLACpQPq285OwKe32B1JQ0Tw6YJ6AvezHWQOTu09ZbFnUhkhYmnWBAdRQGkfJVqIpCNR4KBKtNoPMyGQACTCFC2U18gAeSAgAVAB9AAFABBUC_lAABqGJgAPYBrAzYB_0gYBO3kcDIFocCAEkMlmeAs0qFBoloOA0kIHUzSsSiy0cZxqDSVR8EfKxhEUagUEQKwn0U XDTQCRBSPwBBwKYqieHsZJKP8WTQD3WRnEgeR6J8IVWKOQhICoej5H8ewORnUAsNM8ZnAMozEBMhxklUSBuX8QhFA_VSLOcAtHPEyTpNksIbNARRIBCdzPOocZzPGA8MwsmxlHmazUVsop5EyGI6FodjCBONIiGEkL0pvQzFCQYInxOIohOoVx_ACLDSvSxAn1cM4ihoUzysoRQmoAYnAD5-HwUaAm80KPFveBsoUyJ_DEHg438aFQDs3BjP8D5VNipIuSSVwigAYU4x8s1sICtJ1U1NO02AdzUoA) I assume _Iceland.svg_ is WGS 84 (turns out it's close, but not 100%). The only, but difficult, task is to find the lat/lng coordinates of the **SVG bounding box** - lower left and upper right corner points. Then convert all points' coordinates from (lat,lng) to (x,y) and display them. <img alt="image" width="54.140625" height="21" src="https://private-user-images.githubusercontent.com/13038071/313376947-3b81222f-754b-4de7-9ccd-4e45bec3ee94.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3MTA3MjUxNjQsIm5iZiI6MTcxMDcyNDg2NCwicGF0aCI6Ii8xMzAzODA3MS8zMTMzNzY5NDctM2I4MTIyMmYtNzU0Yi00ZGU3LTljY2QtNGU0NWJl YzNlZTk0LnBuZz9YLUFtei1BbGdvcml0aG09QVdTNC1ITUFDLVNIQTI1NiZYLUFtei1DcmVkZW50aWFsPUFLSUFWQ09EWUxTQTUzUFFLNFpBJTJGMjAyNDAzMTglMkZ1cy1lYXN0LTElMkZzMyUyRmF3czRfcmVxdWVzdCZYLUFtei1EYXRlPTIwMjQwMzE4VDAxMjEwNFomWC1BbXotRXhwaXJlcz0zMDAmWC1BbXotU2lnbmF0dXJlPWRkNzk3OWI4ZjEyMjk0YjhlMDQ5ODI3YzE0ZDUxMTVhZjM3MWU0OTY0MDJhMDk2YWRjMGU5ODM0MzM3N2IwZTgmWC1BbXotU2lnbmVkSGVhZGVycz1ob3N0JmFjdG9yX2lkPTAma2V5X2lkPTAmcmVwb19pZD0wIn0.HuuUt3Hnl4F3MDdtJuYJXsYZqz_AhgfUZpIiHD2CyzE">可以，前提是用于绘制 SVG 地图的地理坐标系为 WGS 84。在我的演示中，我假设Iceland.svg是 WGS 84（事实证明它很接近，但不是 100%）。唯一但困难的任务是找到 SVG 边界框的纬度/液度坐标 - 左下角和右上角点。然后将所有点的坐标从 （lat，lng） 转换为 （x，y） 并显示它们。 <img alt="image" width="54.140625" height="21" src="https://private-user-images.githubusercontent.com/13038071/313376947-3b81222f-754b-4de7-9ccd-4e45bec3ee94.png?jwt=eyJhbGciOiJIUz I1NiIsInR5cCI6IkpXVCJ9.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.HuuUt3Hnl4F3MDdtJuYJXsYZqz_AhgfUZpIiHD2CyzE"> > > Thank you very much for your reply.Do you have any good methods to find the lat/lng coordinates of the SVG bounding box？非常感谢您的回复。你有什么好的方法来找到SVG边界框的lat/lng坐标吗？ > > Is there any way to convert lng/lat coordinates into x/y coordinates有没有办法将 lng/lat 坐标转换为 x/y 坐标 > > Yes, provided that the geographic coordinate system used for drawing the SVG map is WGS 84.可以，前提是用于绘制 SVG 地图的地理坐标系为 WGS 84。 In my [Demo](https://echarts.apache.org/examples/en/editor.html?c=geo-svg-scatter-simple&code=PTAECMHsFcDsBMCWsDmFIA9TNAGwIYAuwuqAULpLgKYBmhoAvKANoBsAzADSgC0ATAFYAdGwCM_ALoBuMtAAOAJ0QoAFg2bsA7MP7itPXhN1iZZeEXwBnahtABvMqFBIAttVhXEkTwC5WAOSw-O4BPAEEhGGgEagBklxOoFYwigDG1P4sSc4sAQBK1ACeANYAVvgAbgC3JdFsACzCYhwAnK1srYb8YsKtDVqtABxaCTmBAGr4uASw1Fb1ImKtHA2CDYZiTYIcbGx6Y865AQDKhPi0F9Qz9U0NWw2dm01Dgvz8AAwNh0d5ABLQKxVRB1Hh7YRfLb8TY6DgcLQND6jRJHQKUGj0aLouiEFgfBJ4Kg4limH7HBTKNRRHgUlTqPEE2lUkmSSRJNkAX1kAHdEPBCKomKAxENVtJnKpqHS7Fshq1xaAQKAThMAOIuRDuTzeTxkVRpIWS6WK0AACiZ9PxfEJGNx-IAlOKlbRIIo8EQyNyDcxefzBWBzUppSzrdj6CzHYqwC63aQUGQrPwhSwzBZzjZCMIUtB0tRhK58PJTaaMPamAA-BxJRPCeSA1Sm7KojAMlFHACyRFUwnw4CsJZDvFAFrtkjLACpQPq285OwKe32B1JQ0Tw6YJ6AvezHWQOTu09ZbFnUhkhYmnWBAdRQGkfJVqIpCNR4KBKtNoPMyGQACTCFC2U18gAeSAgAVAB9AAFABBUC_lAABqGJgAPYBrAzYB_ 0gYBO3kcDIFocCAEkMlmeAs0qFBoloOA0kIHUzSsSiy0cZxqDSVR8EfKxhEUagUEQKwn0UXDTQCRBSPwBBwKYqieHsZJKP8WTQD3WRnEgeR6J8IVWKOQhICoej5H8ewORnUAsNM8ZnAMozEBMhxklUSBuX8QhFA_VSLOcAtHPEyTpNksIbNARRIBCdzPOocZzPGA8MwsmxlHmazUVsop5EyGI6FodjCBONIiGEkL0pvQzFCQYInxOIohOoVx_ACLDSvSxAn1cM4ihoUzysoRQmoAYnAD5-HwUaAm80KPFveBsoUyJ_DEHg438aFQDs3BjP8D5VNipIuSSVwigAYU4x8s1sICtJ1U1NO02AdzUoA) I assume _Iceland.svg_ is WGS 84 (turns out it's close, but not 100%).在我的演示中，我假设Iceland.svg是 WGS 84（事实证明它很接近，但不是 100%）。 The only, but difficult, task is to find the lat/lng coordinates of the **SVG bounding box** - lower left and upper right corner points.唯一但困难的任务是找到 SVG 边界框的纬度/液度坐标 - 左下角和右上角点。 Then convert all points' coordinates from (lat,lng) to (x,y) and display them.然后将所有点的坐标从 （lat，lng） 转换为 （x，y） 并显示它们。  I want to know how to convert longitude and latitude into x, y of SVG; Looking forward to your reply -- This is an automated message from the Apache Git Service. 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