// 分块请求 POI
private int requestBlockPoi(int rowNum, int colNum)
{
// 获取对应矢量
int fid = Convert.ToInt32(city.Id);
Geometry geometry = GisUtil.GetGeometry(fid);
// 获取间隔
Envelope envelope = new Envelope();
geometry.GetEnvelope(envelope);
double xInterval = (envelope.MaxX - envelope.MinX) / colNum;
double yInterval = (envelope.MaxY - envelope.MinY) / rowNum;
// 逐分块请求
double minX;
double minY;
double maxX;
double maxY;
minY = envelope.MinY;
for (int i = 0; i < rowNum; i++)
{
maxY = minY + yInterval;
minX = envelope.MinX;
for (int j = 0; j < colNum; j++)
{
maxX = minX + xInterval;
int subType = GisUtil.GetEnvelopeRelationship(geometry, minX, maxX, minY, maxY);
if (subType > 0)
{
string bounds = string.Format("{0},{1},{2},{3}", minY, minX, maxY, maxX);
Geometry geo = null; // 不做相交判断
if (subType == 1) // geometry 与子块相交
{
geo = geometry; // 需要做相交判断
}
int page = 0;
int stopFlag = 0;
while (stopFlag == 0)
{
stopFlag = handler.GetBoundsPageData(bounds, page, geo);
page++;
}
if (stopFlag < 0) // 返回错误
{
return(stopFlag);
}
}
minX = maxX;
}
minY = maxY;
}
return(0);
}
public async void Work(object obj)
{
_map.ClearGraphic("Highlight");
if (Once)
{
IsObsolete = true;
}
var message = "";
var args = obj as MapViewInputEventArgs;
if (args != null)
{
var e = args;
message = "<Document TaskGuid=\"" + Map.TaskGuid + "\" DataGuid = \"数据标识\" DataType=\"Identify\">";
var util = new GisUtil(_map);
if (Identifys != null)
{
foreach (SingleIdentify si in Identifys)
{
var result = await util.DoIdentify(si.Service, si.Layer, e.Location);
if (result == null)
{
continue;
}
if (result.Results != null && result.Results.Count > 0)
{
message += "<Service ID=\"" + si.Service + "\">";
foreach (IdentifyItem item in result.Results)
{
_map.AddGraphic(new Graphic(item.Feature.Geometry, item.Feature.Attributes), "Highlight");
message += "<Item LayerID=\"" + item.LayerID + "\" LayerName=\"" + item.LayerName + "\">";
foreach (KeyValuePair <string, object> kv in item.Feature.Attributes)
{
message += string.Format("<{0}>{1}</{0}>", kv.Key, kv.Value);
}
message += "</Item>";
}
message += "</Service>";
}
//break;
}
}
message += "</Document>";
}
Callback?.Invoke(message);
}
public void Test_Meters()
{
var eastWest = 406432730.00 / 1000.0;
var northSouth = 4324887681.00 / 1000.0;
var lat = GisUtil.MetersToLatituide(eastWest);
var lon = GisUtil.MetersToLongitude(northSouth, lat);
var latDegree = 180 * lat / Math.PI;
var lonDegree = 180 * lon / Math.PI;
Assert.True(lat > 0);
Assert.True(lon > 0);
}
// 剔除 Geometry 外的点
private List <PoiInfo> removeOuter(List <PoiInfo> poiList, Geometry geometry)
{
List <PoiInfo> newPoiList = new List <PoiInfo>();
foreach (PoiInfo poi in poiList)
{
if (GisUtil.IsContainsPoint(geometry, poi.Lng, poi.Lat))
{
newPoiList.Add(poi);
}
}
return(newPoiList);
}
public async void SetModel(TrackModel tm)
{
_map.GetGraphicLayer("Drawing").IsCluster = false;
_map.GetGraphicLayer("Drawing").Labeling.IsEnabled = false;
Tm = tm;
if (tm.TrackPoints.Count < 2)
{
MessageBox.Show("错误的轨迹数据");
Visibility = Visibility.Hidden;
return;
}
Slider.Minimum = 0;
Slider.Maximum = tm.TrackPoints.Count - 1;
Slider.TickFrequency = 1;
Slider.Value = 0;
_map.ClearGraphic("Drawing");
_currentIndex = 0;
_map.AddGraphic(tm.TrackLine, "Drawing");
bool tag = false;
foreach (Graphic g in tm.TrackPoints)
{
if (!tag)
{
tag = true;
g.Symbol = tm.StartSymbol;
}
_map.AddGraphic(g, "Drawing");
}
GisUtil util = new GisUtil(_map);
await util.Locate(tm.TrackLine.Geometry, 20);
}
// 点击分块建议按钮
private void buttonBlock_Click(object sender, EventArgs e)
{
// 关键字
string keyWord = getKeyWord();
if (string.IsNullOrEmpty(keyWord))
{
MessageBox.Show("请输入自定义关键字");
return;
}
// 获取对应矢量
string cityName = comboBoxCity.SelectedItem.ToString();
City city = CityDao.SelectByName(cityName);
if (city == null)
{
MessageBox.Show("此城市没有相应的矢量数据，无法分块获取POI");
return;
}
int fid = Convert.ToInt32(city.Id);
// 开始请求
Region region = comboBoxCity.SelectedItem as Region;
handler = new PlaceAPIHandler(region, keyWord);
int totalNum = handler.GetTotalNum((comboBoxProvince.SelectedItem as Region).Name);
if (totalNum < 0) // 返回错误
{
MessageBox.Show(PlaceAPIHandler.GetErrMsg(totalNum));
}
else if (totalNum <= 400)
{
MessageBox.Show(string.Format("区域：{0}，关键词：{1}，共有 {2} 个结果，无需分块", region.Name, keyWord,
totalNum));
checkBoxBlock.Checked = false;
}
else // 有结果
{
int blockNum = totalNum / 400 + 1; // 最少分块数
Envelope envelope = GisUtil.GetEnvelope(fid);
double x = envelope.MaxX - envelope.MinX;
double y = envelope.MaxY - envelope.MinY;
int xNum = 1;
int yNum = 1;
if (x <= y)
{
double r = y / x;
xNum = Convert.ToInt32(Math.Sqrt(blockNum / r)) + 1;
yNum = Convert.ToInt32(xNum * r) + 1;
}
else
{
double r = x / y;
yNum = Convert.ToInt32(Math.Sqrt(blockNum / r)) + 1;
xNum = Convert.ToInt32(yNum * r) + 1;
}
xNum *= 2;
yNum *= 2;
MessageBox.Show(string.Format("区域：{0}，关键词：{1}，共有 {2} 个结果。建议分块为 {3} 行，{4} 列",
region.Name, keyWord, totalNum, yNum, xNum));
// 自动调整行列分块数
if (xNum > 20)
{
comboBoxBlockCol.Items.Clear();
for (int i = 1; i <= xNum + 10; i++)
{
comboBoxBlockCol.Items.Add(i);
}
}
comboBoxBlockCol.SelectedIndex = xNum - 1;
if (yNum > 20)
{
comboBoxBlockRow.Items.Clear();
for (int j = 1; j <= yNum + 10; j++)
{
comboBoxBlockRow.Items.Add(j);
}
}
comboBoxBlockRow.SelectedIndex = yNum - 1;
}
}
public void Test_Wgs84()
{
var m = GisUtil.Wgs84Transform(2.1196599980996, 0.543224178326409, 0);
Assert.True(m != null);
}