I want to Convert Coordinates to Geometries,

[Xu PengYan]

I have the Xcenter,Ycenter,Xmax, Ymax,Xmin,YminCoordinates,but i also need theGeometries.I want to konw how to convert it in spotfire. Thanks so much.

[Neil Kanungo 2]

Hi eagle.xu,

First, let's clarify this. Are you trying to generate geometries from Xmin,Xmax, etc

That's not possible (in any software). The geometries objects have their own data . Each vertex that goes along a line (or boundary) in a geometry is a separate xy-coordinate. Now, when you have a bunch of xy-coordinates in a sequence, that can create a polygon, and from the polygon you can extract min/max and centroid information (like Xcenter,Ycenter,Xmax,Xmin, etc). It's impossible to go the other way however.

Now if I've misunderstood and youdohave that geometry data somewhere but just can't get it to show in Spotfire, let us know and we can diagnose the issue.

[Xu PengYan]

Maybe i haven't describe my mean. I want to use the Xcenter,Ycenter,Xmax, Ymax,Xmin,Ymin to create a polygon.Like the pciture .Every ID of the data ,can have the only one polygon on the map.I dont  konw its impossible Thanks so much.

[Neil Kanungo 2]

Given the data you have, you would only be able to draw simple shapes (like circles or rectangles) using your Xmin, Xmax, Ymin, Ymax, Ycenter, Xcenter. You can do this using a TERR Data Function in Spotfire.

 

For circles, start with this: https://community.spotfire.com/wiki/useful-geospatial-data-functions-spotfire#toc-4

 

For rectangles, start with this: https://community.spotfire.com/wiki/useful-geospatial-data-functions-spotfire#toc-5

 

Both of these are for "fixed" dimensions, but if you wanted varying dimensions for your different rows of Xmin, Xmax, etc, then you could modify the data function scripts.

 

Alternatively, if you have a set of coordinates you wanted to connect together to make a single geometry, you can use this Data Function (though I don't believe this is your scenario): https://community.spotfire.com/wiki/useful-geospatial-data-functions-spotfire#toc-3

 

Ultimately, I believe with what you're trying to do, you don't have the data required to plot complex geometries. You should reach out to the provider of your data source and see if they can provide you the geometry data -- likely in a Shapefile (.shp)

[Xu PengYan]

thanks so much , you sloved my problem.