P2022036_ExportMap.git

			@@ -6,6 +6,7 @@
			<script src="js/jquery.1.12.4.js"></script>
			<script src="js/rsa.min.js"></script>
			<script src="js/rollups.js"></script>
			<script src="js/turf.min.6.5.js"></script>
			<script src="js/insertFiles.js"></script>
			<script>
			var app = {};
			@@ -448,6 +449,30 @@
			alert("code = " + rs.code + ", msg = " + rs.msg + ", result = " + rs.result);
			});
			}

			// 生成缓冲区
			function generateBuffer() {
			var strs = $("#inpPoint").val().replace("POINT (", "").replace(")", "").split(" ");
			var x = parseFloat(strs[0]), y = parseFloat(strs[1]);

			var buffer = parseFloat($("#buffer").val()) / 1000;
			var steps = parseInt($("#steps").val());
			//var point = turf.point([x, y]);
			//var buffered = turf.buffer(point, buffer, { units: 'kilometers', steps: 16 });
			//var options = { precision: 6, coordinates: 2 };
			//var truncated = turf.truncate(buffered, options);

			var circle = turf.circle([x, y], buffer, { steps: steps, units: 'kilometers' });
			var cc = turf.truncate(circle, { precision: 6, coordinates: 2 });

			var arr = [], cs = cc.geometry.coordinates[0];
			for (var i = 0, c = cs.length; i < c; i++) {
			arr.push(cs[i][0] + " " + cs[i][1]);
			}
			var wkt = "POLYGON((" + arr.join(",") + "))";

			$("#oupArea").html(wkt);
			}
			</script>
			</head>
			<body>
			@@ -504,6 +529,15 @@
			<input value="附件下载2" type="button" onclick="downloadReqForTabGuids();" />
			<hr />
			<br />

			Turf：
			<input id="inpPoint" type="text" value="POINT (100.746244878 35.588071316)" style="width: 256px;" />
			<input id="buffer" value="1" type="text" style="width: 30px;" />米
			<input id="steps" value="8" type="text" style="width: 30px;" />步数
			<textarea id="oupArea" style="width: 512px; vertical-align: bottom;"></textarea>
			<input value="生成" type="button" onclick="generateBuffer();" />
			<hr />
			<br />
			</form>
			<br />
			<br />