/// <summary>
/// 将全景图按照由近及远排序
/// </summary>
/// <param name="lat">定位位置的纬度</param>
/// <param name="lng">定位位置的经度</param>
/// <returns></returns>
public IEnumerable <PanoramaScene> GetAllPanoramaScenesOrderByDistance(double lat = 28.9721214555, double lng = 118.8898357316, int pageSize = 15, int index = 0)
{
var query = from ps in _sceneRepository.TableNoTracking
where !ps.Deleted
select ps;
var panoramaScenes = query.ToList();
var panoramaScenesOrderedResult = panoramaScenes
.OrderBy(ps => GeographyHelper.GetDistance(ps.PanoramaLocation.Lat, ps.PanoramaLocation.Lng, lat, lng))
.ThenByDescending(ps => ps.ProductionDate);
var locationNameList = new List <string>();
var resultPanomarScenesFilterResult = new List <PanoramaScene>();
foreach (var scene in panoramaScenesOrderedResult)
{
if (locationNameList.Contains(scene.PanoramaLocation.Name))
{
continue;
}
else
{
resultPanomarScenesFilterResult.Add(scene);
locationNameList.Add(scene.PanoramaLocation.Name);
}
}
var resultPanomarScenesResult = resultPanomarScenesFilterResult.Skip(index * pageSize).Take(pageSize);
return(resultPanomarScenesResult);
}
public IHttpActionResult GetPreviewList(double lat = 28.9721214555, double lng = 118.8898357316, int pageSize = 15, int index = 0)
{
var coord = _sceneService.GetAllPanoramaScenesOrderByDistance(lat, lng, pageSize, index);
var scenes = coord.ToList().Select(ps =>
{
var previewModel = ps.ToPreviewModel();
previewModel.Produce = "衢州市地理信息中心";
previewModel.ImgPath += ps.ProductionDate.ToString("yyyyMMdd") + ".tiles";
previewModel.LocationId = ps.PanoramaLocation.Id;
previewModel.Lng = ps.PanoramaLocation.Lng;
previewModel.Lat = ps.PanoramaLocation.Lat;
previewModel.Dist = Math.Floor(GeographyHelper.GetDistance(ps.PanoramaLocation.Lat, ps.PanoramaLocation.Lng, lat, lng));
if (previewModel.Dist > 5000)
{
previewModel.Dist = 5000;
}
return(previewModel);
});
return(Ok(scenes));
}