public async Task <ActionResult> QueryRadius(RadiusQuery query)
{
if (!ModelState.IsValid)
{
return(Json("Bad Request", JsonRequestBehavior.AllowGet));
}
var centerPoint = new GeoPoint(query.Lat, query.Lng);
var radius = query.RadiusInMeters;
var attributesToGet = new List <string>
{
_config.RangeKeyAttributeName,
_config.GeoJsonAttributeName,
"schoolName"
};
var radReq = new QueryRadiusRequest(centerPoint, radius);
radReq.QueryRequest.AttributesToGet = attributesToGet;
var result = await _geoDataManager.QueryRadiusAsync(radReq);
var dtos = GetResultsFromQuery(result);
return(Json(dtos, JsonRequestBehavior.AllowGet));
}
public async Task <APIGatewayProxyResponse> FunctionHandler(APIGatewayProxyRequest input, ILambdaContext context)
{
context.Logger.LogLine($"Enter to {context.FunctionName}. Params {JsonConvert.SerializeObject(input)}");
double lat = 1, lng = 1, radius = 2000;
string latStr = "", lngStr = "", radiusStr = "";
var success = input.QueryStringParameters?.TryGetValue("lat", out latStr) ?? false;
if (success)
{
lat = Double.Parse(latStr ?? "");
}
success = input.QueryStringParameters?.TryGetValue("lng", out lngStr) ?? false;
if (success)
{
lng = Double.Parse(lngStr);
}
success = input.QueryStringParameters?.TryGetValue("radius", out radiusStr) ?? false;
if (success)
{
radius = Double.Parse(radiusStr);
}
QueryRadiusResult queryResult;
var centerPoint = new GeoPoint(lat, lng);
var attributesToGet = new List <string>
{
_config.RangeKeyAttributeName,
_config.GeoJsonAttributeName,
"imgUrl",
"imgUrlLarge",
};
try
{
var radReq = new QueryRadiusRequest(centerPoint, radius);
radReq.QueryRequest.AttributesToGet = attributesToGet;
queryResult = await _geoDataManager.QueryRadiusAsync(radReq);
}
catch (Exception e)
{
throw;
}
var result = GetResultsFromQuery(queryResult);
var serializedResult = JsonConvert.SerializeObject(result);
context.Logger.LogLine($"Get dots: ({serializedResult})");
return(CreateResponse(serializedResult));
}
/// <summary>
/// <p>
/// Query a circular area constructed by a center point and its radius.
/// </p>
/// <b>Sample usage:</b>
/// <pre>
/// GeoPoint centerPoint = new GeoPoint(47.5, -122.3);
/// QueryRadiusRequest queryRadiusRequest = new QueryRadiusRequest(centerPoint, 100);
/// QueryRadiusResult queryRadiusResult = geoIndexManager.queryRadius(queryRadiusRequest);
/// for (Map<String, AttributeValue> item : queryRadiusResult.getItem()) {
/// System.out.println("item: " + item);
/// }
/// </pre>
/// </summary>
/// <param name="queryRadiusRequest">Container for the necessary parameters to execute radius query request.</param>
/// <returns>Result of radius query request.</returns>
public async Task <QueryRadiusResult> QueryRadiusAsync(QueryRadiusRequest queryRadiusRequest, CancellationToken cancellationToken = default(CancellationToken))
{
if (queryRadiusRequest == null)
{
throw new ArgumentNullException("queryRadiusRequest");
}
if (queryRadiusRequest.RadiusInMeter <= 0 || queryRadiusRequest.RadiusInMeter > S2LatLng.EarthRadiusMeters)
{
throw new ArgumentOutOfRangeException("queryRadiusRequest", "RadiusInMeter needs to be > 0 and <= " + S2LatLng.EarthRadiusMeters);
}
var latLngRect = S2Util.GetBoundingLatLngRect(queryRadiusRequest);
var cellUnion = S2Manager.FindCellIds(latLngRect);
var ranges = MergeCells(cellUnion);
var result = await DispatchQueries(ranges, queryRadiusRequest, cancellationToken).ConfigureAwait(false);
return(new QueryRadiusResult(result));
}
public async Task <ActionResult> radiusQueryAsync(radiusQuery query)
{
var centerPoint = new GeoPoint(query.lat, query.lng);
var radius = query.miles * 1609.34;
var attributesToGet = new List <string>
{
_config.RangeKeyAttributeName,
_config.GeoJsonAttributeName
// "zipcode",
// "Title"
};
var radReq = new QueryRadiusRequest(centerPoint, radius);
radReq.QueryRequest.AttributesToGet = attributesToGet;
// radReq.QueryRequest.TableName = _config.TableName;
var result = await _geoDataManager.QueryRadiusAsync(radReq);
var dtos = GetResultsFromQuery(result);
return(Json(dtos));
}
