總結:
considerations for choosing the coordinate system:
- map purpose
- map extent
- map orientation
- latitude range
- national coordinate system
- maps for use on the Web
- geographic databases are in latitude-longitude (geographic coordinates)
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原文鏈接【1】:
https://gis.stackexchange.com/questions/2769/what-strategies-criteria-or-rules-to-use-for-selecting-coordinate-systems
https://support.esri.com/en/technical-article/000006113
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Coordinate_systems_for_map_display/006600000010000000/
我的筆記:
(1)by 目的
依據不同的目的選擇投影方式(包括:shape/area/direction/distance)。
請先確定哪個目標對你的研究最爲重要,繼而選擇最能保留該屬性的座標系或地圖投影。
(注:各投影的詳細信息如下http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?id=113&pid=112&topicname=List_of_supported_map_projections)
(2)by 準確性
投影過後可能會損失一些信息,準確性是非常重要的參考內容
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原文鏈接【2】:
https://www.maptools.com/selecting_a_coordinate_system
我的筆記:
有關UTM投影(通用橫軸墨卡託投影)的介紹
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原文鏈接【3】:
https://jingyan.baidu.com/article/9158e0002d7099a2541228c6.html
我的筆記:
(1)by 區域範圍
是世界,大洲還是國家數據庫?
(2)by 地理位置
是極地、中緯度還是赤道地區?
(3)by 大致形狀(圖形走向)
區域大體爲圓形,還是在東西、南北或某個傾斜方向上更長一些?
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原文鏈接【4】:
https://groups.google.com/forum/#!topic/gis-in-ecology-forum/9l67V6nMRoA
我的筆記:
文章中給出的鏈接
http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=About_geographic_coordinate_systems
http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=About_projected_coordinate_systems
http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=List_of_supported_map_projections
http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=Transverse_Mercator
http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=Lambert_Azimuthal_Equal_Area
http://webhelp.esri.com/arcgisdesktop / 9.3 / index.cfm?TopicName = Equidistant_Conic
http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=Geographic_transformation_methods
http://support.esri.com/en/knowledgebase/techarticles/detail/21327
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原文鏈接【5】:
https://gis.stackexchange.com/questions/10438/defining-the-appropriate-projected-coordinate-system
我的筆記:
An alternative method that will work for the purpose.
- insert your data into an arcmap document,
- right click on the TOC (table of contents) layers and select properties,
- Select the coordinate systems tab and assign CRS as suggested in other posts here.
- open the attribute table and add miles2 field if you don’t already have one defined.
- Right click on that field in the attribute table window and select calculate geometry.
- Next select the use crs of data frame radio button, and the units you would like.