6个回答
22
经过大量研究，我发现了这个例子。在发现并进行谷歌搜索后，它似乎是解决像我这样问题的通用答案。根据V3 API，这很基础但正确。
使用这个示例中的代码，我成功地构建了一个我需要的原型。虽然代码很基础，但我发现它可以扩展以更好地满足我的规格要求，这很不错。
我在评论中提供的链接可能是最佳解决方案，但开发人员表示它仍在开发中，因此不稳定，不能在发布应用程序中使用。
- David 'the bald ginger'
2
1你的示例不起作用，你能提供另一个有效的URL吗？ - HKumar
这个答案和相关链接是6年前给出的。据我所知，谷歌在地图“API”的绘图工具功能方面已经做了一些不错的工作。我建议访问https://developers.google.com看看最新情况。 - David 'the bald ginger'
12
- helmi03
1
2@Phaed：你推荐的polygonEdit链接被Comodo标记为钓鱼网站：该网站可能会冒充合法网站试图收集您的个人信息，从而构成犯罪欺诈行为。这个网站已经被多个用户报告为不安全，我们不建议您继续浏览。 - Yster
5
请看我编写的弯曲线条脚本：
http://curved_lines.overfx.net/
下面是我使用的函数：
function curved_line_generate(LatStart, LngStart, LatEnd, LngEnd, Color, Horizontal, Multiplier) {
var LastLat = LatStart;
var LastLng = LngStart;
var PartLat;
var PartLng;
var Points = new Array(0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9);
var PointsOffset = new Array(0.2, 0.35, 0.5, 0.55, 0.60, 0.55, 0.5, 0.35, 0.2);
var OffsetMultiplier = 0;
if (Horizontal == 1) {
var OffsetLenght = (LngEnd - LngStart) * 0.1;
} else {
var OffsetLenght = (LatEnd - LatStart) * 0.1;
}
for (var i = 0; i < Points.length; i++) {
if (i == 4) {
OffsetMultiplier = 1.5 * Multiplier;
}
if (i >= 5) {
OffsetMultiplier = (OffsetLenght * PointsOffset[i]) * Multiplier;
} else {
OffsetMultiplier = (OffsetLenght * PointsOffset[i]) * Multiplier;
}
if (Horizontal == 1) {
PartLat = (LatStart + ((LatEnd - LatStart) * Points[i])) + OffsetMultiplier;
PartLng = (LngStart + ((LngEnd - LngStart) * Points[i]));
} else {
PartLat = (LatStart + ((LatEnd - LatStart) * Points[i]));
PartLng = (LngStart + ((LngEnd - LngStart) * Points[i])) + OffsetMultiplier;
}
curved_line_create_segment(LastLat, LastLng, PartLat, PartLng, Color);
LastLat = PartLat;
LastLng = PartLng;
}
curved_line_create_segment(LastLat, LastLng, LatEnd, LngEnd, Color);
}
function curved_line_create_segment(LatStart, LngStart, LatEnd, LngEnd, Color) {
var LineCordinates = new Array();
LineCordinates[0] = new google.maps.LatLng(LatStart, LngStart);
LineCordinates[1] = new google.maps.LatLng(LatEnd, LngEnd);
var Line = new google.maps.Polyline({
path: LineCordinates,
geodesic: false,
strokeColor: Color,
strokeOpacity: 1,
strokeWeight: 3
});
Line.setMap(map);
}
以下是您的HTML内容和初始化脚本：
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
var map;
google.maps.event.addDomListener(window, 'load', initialize);
function initialize() {
/* Create Google Map */
var myOptions = {
zoom: 6,
center: new google.maps.LatLng(41, 19.6),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'), myOptions);
/* Add Sample Lines */
/* Sofia - Burgas */
curved_line_generate(42.68243562027229, 23.280029421875042, 42.488302202180364, 27.432861453125042,"#F00", true, 1);
/* Sofia - Varna */
curved_line_generate(42.68243562027229, 23.280029421875042, 43.19716750254011, 27.894287234375042,"#1a8809", true, 1);
/* Ancona - Sofia */
curved_line_generate(43.61221698671215, 13.458252078125042,42.68243562027229, 23.280029421875042, "#00F", true, 1);
/* Sofia - Florence */
curved_line_generate(42.68243562027229, 23.280029421875042, 43.73935229722859, 11.217041140625042,"#666", true, 1);
/* Sofia - Athens */
curved_line_generate(42.68243562027229, 23.280029421875042, 37.97884527841534, 23.719482546875042,"#ffa200", false, 2);
}
</script>
- Daniel Nanovski
4
请看这个例子，来自地图API v3的示例页面：http://code.google.com/apis/maps/documentation/javascript/examples/polyline-complex.html。代码监听地图上的点击事件，每次点击时将一个额外的经纬度对添加到折线的数组中。这样就形成了一条连接每个点击点的折线。
将此扩展到多边形应该相对简单。在某个时刻，您需要关闭多边形。您可以通过监听多边形或标记（表示交叉点）上的点击事件，或者通过让用户点击一个按钮并设置多边形为自动关闭来实现这一点。
将此扩展到多边形应该相对简单。在某个时刻，您需要关闭多边形。您可以通过监听多边形或标记（表示交叉点）上的点击事件，或者通过让用户点击一个按钮并设置多边形为自动关闭来实现这一点。
- plexer
2
谢谢信息，plexer。我发现了两件有趣的事情，其中一件我会标记为问题的“答案”。但是请看 http://www.shanetomlinson.com/2010/enabledrawing-enableediting-for-gmap-v3/ 和他的示例。它仍然有点不稳定，所以不是最好的解决方案，但他似乎朝着正确的方向前进。 - David 'the bald ginger'
3
我觉得这个很容易。你可以绘制多边形，可以找到它们的长度，非常简单。以下是代码示例，以防链接失效：http://geojason.info/demos/line-length-polygon-area-google-maps-v3/
var map;
// Create a meausure object to store our markers, MVCArrays, lines and polygons
var measure = {
mvcLine: new google.maps.MVCArray(),
mvcPolygon: new google.maps.MVCArray(),
mvcMarkers: new google.maps.MVCArray(),
line: null,
polygon: null
};
// When the document is ready, create the map and handle clicks on it
jQuery(document).ready(function() {
map = new google.maps.Map(document.getElementById("map"), {
zoom: 15,
center: new google.maps.LatLng(39.57592, -105.01476),
mapTypeId: google.maps.MapTypeId.ROADMAP,
draggableCursor: "crosshair" // Make the map cursor a crosshair so the user thinks they should click something
});
google.maps.event.addListener(map, "click", function(evt) {
// When the map is clicked, pass the LatLng obect to the measureAdd function
measureAdd(evt.latLng);
});
});
function measureAdd(latLng) {
// Add a draggable marker to the map where the user clicked
var marker = new google.maps.Marker({
map: map,
position: latLng,
draggable: true,
raiseOnDrag: false,
title: "Drag me to change shape",
icon: new google.maps.MarkerImage(
"/images/demos/markers/measure-vertex.png",
new google.maps.Size(9, 9),
new google.maps.Point(0, 0),
new google.maps.Point(5, 5)
)
});
// Add this LatLng to our line and polygon MVCArrays
// Objects added to these MVCArrays automatically update the line and polygon shapes on the map
measure.mvcLine.push(latLng);
measure.mvcPolygon.push(latLng);
// Push this marker to an MVCArray
// This way later we can loop through the array and remove them when measuring is done
measure.mvcMarkers.push(marker);
// Get the index position of the LatLng we just pushed into the MVCArray
// We'll need this later to update the MVCArray if the user moves the measure vertexes
var latLngIndex = measure.mvcLine.getLength() - 1;
// When the user mouses over the measure vertex markers, change shape and color to make it obvious they can be moved
google.maps.event.addListener(marker, "mouseover", function() {
marker.setIcon(
new google.maps.MarkerImage("/images/demos/markers/measure-vertex-hover.png",
new google.maps.Size(15, 15),
new google.maps.Point(0, 0),
new google.maps.Point(8, 8)
)
);
});
// Change back to the default marker when the user mouses out
google.maps.event.addListener(marker, "mouseout", function() {
marker.setIcon(
new google.maps.MarkerImage(
"/images/demos/markers/measure-vertex.png",
new google.maps.Size(9, 9),
new google.maps.Point(0, 0),
new google.maps.Point(5, 5)
)
);
});
// When the measure vertex markers are dragged, update the geometry of the line and polygon by resetting the
// LatLng at this position
google.maps.event.addListener(marker, "drag", function(evt) {
measure.mvcLine.setAt(latLngIndex, evt.latLng);
measure.mvcPolygon.setAt(latLngIndex, evt.latLng);
});
// When dragging has ended and there is more than one vertex, measure length, area.
google.maps.event.addListener(marker, "dragend", function() {
if (measure.mvcLine.getLength() > 1) {
measureCalc();
}
});
// If there is more than one vertex on the line
if (measure.mvcLine.getLength() > 1) {
// If the line hasn't been created yet
if (!measure.line) {
// Create the line (google.maps.Polyline)
measure.line = new google.maps.Polyline({
map: map,
clickable: false,
strokeColor: "#FF0000",
strokeOpacity: 1,
strokeWeight: 3,
path:measure. mvcLine
});
}
// If there is more than two vertexes for a polygon
if (measure.mvcPolygon.getLength() > 2) {
// If the polygon hasn't been created yet
if (!measure.polygon) {
// Create the polygon (google.maps.Polygon)
measure.polygon = new google.maps.Polygon({
clickable: false,
map: map,
fillOpacity: 0.25,
strokeOpacity: 0,
paths: measure.mvcPolygon
});
}
}
}
// If there's more than one vertex, measure length, area.
if (measure.mvcLine.getLength() > 1) {
measureCalc();
}
}
- Raza Ahmed
1
感谢TheRaaaZ提供的代码。我很快就会开始涉及地理位置项目，这肯定会有所帮助，让我重新回到状态。看起来有些事情已经改变了，我猜这很大程度上是由于最近Google Maps的重大升级所致？ - David 'the bald ginger'
2
我找到的多边形编辑器实现中，这个看起来是最接近它的：http://snipplr.com/view/38270/google-maps-api-v3--enableediting-polylines/
- Kevin
网页内容由stack overflow 提供, 点击上面的可以查看英文原文，
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