Facade elevation drawing class, through this function, the elevation drawing of the specified range is output to the model in the scene.
    
Members
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    endPoint : Cartesian3
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    Get the endpoint.
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    Get or set the maximum distance of the elevation drawing range.
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    Get or set the maximum height of the elevation plot.
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    An asynchronous object that parses out the base64 string of the elevation map (consistent with the usage of the scene map).Example:facade.readyPromise.then(function(base64) { XXX // Convert the base64 string to an image for download or fill it into other elements });
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    startPoint : Cartesian3
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    Get a starting point.
Methods
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    Incorporate the elevation analysis into the analysis layer for update
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    Set the start and end points of the specified line segment drawingName Type Description startPointCartesian3 start position endPointCartesian3 end position 
