Question

数据服务里像素值查询如何查询直线上的值？

示例里只给出了，多边形，圆形和长方形的参数写法，直线如何写？

矩形范围范例:
{"leftBottom":{"x":112.351881,"y":34.663401},"rightTop":{"x":113.361881,"y":35.673401}}

多边形范围范例(不小于三条边):
{"points": [{"x": 107.669629,"y": 32.888868},{"x": 108.012838,"y": 33.594138},
{ "x": 108.674593, "y": 33.281041},{ "x": 107.669629,"y": 32.888868}]}

圆形范围范例（中心点和半径）:
{"circle":{"centerPoint":{"x":112.351881,"y":35.673401},"radius": 1}}

Answer 1

您好，目前gridValues操作只支持

地理范围。支持查询矩形、多边形、圆形范围。例如： 1. 矩形范围： {"leftBottom":{"x":112.351881,"y":34.663401},"rightTop":{"x":113.361881,"y":35.673401}} 2. 多边形范围，需指定不少于三条边： {"points": [{"x": 107.669629,"y": 32.888868},{"x": 108.012838,"y": 33.594138}, { "x": 108.674593, "y": 33.281041},{ "x": 107.669629,"y": 32.888868}]} 3. 圆形范围，需指定中心点和半径： {"circle":{"centerPoint":{"x":112.351881,"y":35.673401},"radius": 1}} 注：如果该参数设置范围过大，即该参数所表达的栅格个数不能超过50万，否则系统将报超限的错误。可根据以下计算式来确定该参数的最大范围： 地理范围=数据集范围*50万/（栅格行数*栅格列数）