/// <summary>
/// Reads a shapefile into a arraylist of features that need converting from x,y coordinates to Long and Lat coordinates
/// </summary>
/// <param name="filename">name of the shapefile (the file that has all the polygons for the footpaths)</param>
/// <param name="fact">the class that generates the structure of the points</param>
/// <returns></returns>
public ArrayList ReadSHP(string filename, GeometryFactory fact)
{
ArrayList features = new ArrayList(); //Array list for all the coordinates from the shapefile
ShapefileDataReader sfDataReader = new ShapefileDataReader(filename, fact); //takes a file and a factory to build the geometries
ShapefileHeader shpHeader = sfDataReader.ShapeHeader; //reads the headers of the file for checking and looping purposes
DbaseFileHeader DHeader = sfDataReader.DbaseHeader;
while (sfDataReader.Read() == true) //reading through all the data in the shapefile
{
Feature feature = new Feature(); //setting up a feature for each set of points
AttributesTable atTable = new AttributesTable(); //table for the set of points
string[] keys = new string[DHeader.NumFields];
Geometry geometry = sfDataReader.Geometry;
for (int i = 0; i < DHeader.NumFields; i++)
{
DbaseFieldDescriptor fldDescriptor = DHeader.Fields[i];
keys[i] = fldDescriptor.Name;
atTable.Add(fldDescriptor.Name, sfDataReader.GetValue(i));
}
feature.Geometry = geometry;
feature.Attributes = atTable; //setting the variables for the feature
features.Add(feature);
}
sfDataReader.Close();//closing the reader
sfDataReader.Dispose();
return(features);
}
private double GetRandomVectorValue(string file, int requests)
{
var featureIds = new int[requests];
var dataReader = new ShapefileDataReader(file, new GeometryFactory());
var numberOfFeatures = dataReader.RecordCount;
Parallel.For(0, requests, index => { featureIds[index] = _rnd.Next(numberOfFeatures); });
// Close the file and reopen after messurement has started
dataReader.Close();
dataReader.Dispose();
var reader = new ShapefileReader(file);
var watch = System.Diagnostics.Stopwatch.StartNew();
var allFeatures = reader.ReadAll();
Parallel.ForEach(featureIds, id =>
{
var feature = allFeatures[id];
// var result = feature;
// Console.WriteLine(result);
});
return(watch.Elapsed.Milliseconds);
}
/// <summary>
/// Reads a shapefile into a arraylist of features that need converting from x,y coordinates to Long and Lat coordinates
/// </summary>
/// <param name="filename">name of the shapefile (the file that has all the polygons for the footpaths)</param>
/// <param name="fact">the class that generates the structure of the points</param>
/// <returns></returns>
public ArrayList ReadSHP(string filename, GeometryFactory fact)
{
ArrayList features = new ArrayList(); //Array list for all the coordinates from the shapefile
ShapefileDataReader sfDataReader = new ShapefileDataReader(filename, fact);
ShapefileHeader shpHeader = sfDataReader.ShapeHeader;
DbaseFileHeader DHeader = sfDataReader.DbaseHeader;
while (sfDataReader.Read() == true)
{
Feature feature = new Feature();
AttributesTable atTable = new AttributesTable();
string[] keys = new string[DHeader.NumFields];
Geometry geometry = sfDataReader.Geometry;
for (int i = 0; i < DHeader.NumFields; i++)
{
DbaseFieldDescriptor fldDescriptor = DHeader.Fields[i];
keys[i] = fldDescriptor.Name;
atTable.Add(fldDescriptor.Name, sfDataReader.GetValue(i));
}
feature.Geometry = geometry;
feature.Attributes = atTable;
features.Add(feature);
}
sfDataReader.Close();
sfDataReader.Dispose();
return(features);
}
protected override void Dispose(bool disposing)
{
try
{
if (disposing)
{
if (_reader != null)
{
_reader.Dispose();
}
}
}
finally
{
_reader = null;
base.Dispose(disposing);
}
}
public static List <Feature> ReadFeatures(string filename)
{
if (!File.Exists(filename))
{
Console.WriteLine("The file " + filename + " does not exist.");
return(new List <Feature>());
}
var result = new List <Feature>();
ShapefileDataReader reader = TryShapefileDataReader(filename);
if (reader == null)
{
return(new List <Feature>());
}
try
{
while (reader.Read())
{
var feature = new Feature();
var attr = new AttributesTable();
var geometry = (Geometry)reader.Geometry;
for (int i = 0; i < reader.DbaseHeader.NumFields; ++i)
{
attr.Add(reader.DbaseHeader.Fields[i].Name, reader.GetValue(i + 1));
}
feature.Geometry = geometry;
feature.Attributes = attr;
result.Add(feature);
}
}
catch (Exception ex)
{
Console.WriteLine("Exception in feature read: " + ex.ToString() + ", filename: " + filename);
}
reader.Close();
reader.Dispose();
return(result);
}
public void Dispose()
{
_shapeFileDataReader.Dispose();
}
public List <Object> CalculateDataTable(string polyfile)
{
//Calling EPA WATERS:
//https://ofmpub.epa.gov/waters10/SpatialAssignment.Service?pGeometry=POINT(-76.7498+37.5)&pLayer=NHDPLUS_CATCHMENT&pAssignmentHint=9894716&pReturnGeometry=TRUE
//List<GeoAPI.Geometries.IGeometry> polys = new List<GeoAPI.Geometries.IGeometry>();
List <GeoAPI.Geometries.IGeometry> squares = new List <GeoAPI.Geometries.IGeometry>();
ArrayList polys = new ArrayList();
ArrayList polyfeats = new ArrayList();
List <Object> infoTable = new List <Object>();
double squareArea = 0;//0.015625;
double gridArea = 0;
double polygonArea = 0;
string catchmentID = "";
//////////////
string gridfile = @"M:\DotSpatTopology\tests\NLDAS_Grid_Reference.shp";//"";
string gridproj = @"M:\DotSpatTopology\tests\NLDAS_Grid_Reference.prj";
//////////////
Guid gid = Guid.NewGuid();
string directory = @"M:\\TransientStorage\\" + gid.ToString() + "\\";
//This block is for getting and setting shapefiles for NLDAS Grid
/**
* client.DownloadFile("https://ldas.gsfc.nasa.gov/nldas/gis/NLDAS_Grid_Reference.zip", @"M:\\TransientStorage\\NLDAS.zip");
* ZipFile.ExtractToDirectory(@"M:\\TransientStorage\\NLDAS.zip", @"M:\\TransientStorage\\NLDAS");
* unzippedLocation = (@"M:\\TransientStorage\\NLDAS");
* foreach (string file in Directory.GetFiles(unzippedLocation))
* {
* if (Path.GetExtension(file).Equals(".shp"))
* {
* gridfile = file;
* }
* else if (Path.GetExtension(file).Equals(".prj"))
* {
* gridproj = file;
* }
* }
* client.Dispose();**/
ShapefileDataReader reader2 = new ShapefileDataReader(gridfile, NetTopologySuite.Geometries.GeometryFactory.Default);
while (reader2.Read())
{
squares.Add(reader2.Geometry);
gridArea += reader2.Geometry.Area;
}
reader2.Dispose();
//if (polyfile.StartsWith(@"{""type"": ""FeatureCollection"""))
if (polyfile.StartsWith(@"{""type"":"))//.geojson
{
Boolean version1 = true;
string[] featureParams = new string[3];
string jsonfile = polyfile;
var readera = new NetTopologySuite.IO.GeoJsonReader();
NetTopologySuite.Features.FeatureCollection result = readera.Read <NetTopologySuite.Features.FeatureCollection>(jsonfile);
if (result[0].Attributes.GetNames().Contains("HUC_8"))
{
version1 = false;
featureParams[0] = "OBJECTID";
featureParams[1] = "HUC_8";
featureParams[2] = "HUC_12";
}
else if (result[0].Attributes.GetNames().Contains("HUC8"))
{
version1 = true;
featureParams[0] = "COMID";
featureParams[1] = "HUC8";
featureParams[2] = "HUC12";
}
else
{
version1 = false;
featureParams[0] = null;
featureParams[1] = null;
featureParams[2] = null;
}
List <Object> huc8Table = new List <Object>();
Dictionary <string, string> h8 = new Dictionary <string, string>();
h8.Add("HUC 8 ID: ", result[0].Attributes[featureParams[1]].ToString());
huc8Table.Add(h8);
//huc8Table.Add(new KeyValuePair<string, string>("HUC 8 ID: ", result[0].Attributes[featureParams[1]].ToString()));
for (int i = 0; i < result.Count; i++)
{
List <Object> huc12Table = new List <Object>();
if (version1)
{
huc12Table.Add(new KeyValuePair <string, string>("HUC 12 ID: ", null));
}
else
{
Dictionary <string, string> h12 = new Dictionary <string, string>();
h12.Add("HUC 12 ID: ", result[i].Attributes["HUC_12"].ToString());
huc12Table.Add(h12);
//huc12Table.Add(new KeyValuePair<string, string>("HUC 12 ID: ", result[i].Attributes["HUC_12"].ToString()));
}
catchmentID = result[i].Attributes[featureParams[0]].ToString();
Dictionary <string, string> cm = new Dictionary <string, string>();
cm.Add("Catchment ID: ", catchmentID);
huc12Table.Add(cm);
//huc12Table.Add(new KeyValuePair<string, string>("Catchment ID: ", catchmentID));
foreach (GeoAPI.Geometries.IGeometry s in squares)
{
double interArea = 0.0;
squareArea = s.Area;
if (result[i].Geometry.Intersects(s))
{
GeoAPI.Geometries.IGeometry intersection = result[i].Geometry.Intersection(s);
interArea += intersection.Area;
double percent2 = (interArea / squareArea) * 100;
Dictionary <string, string> catchTable = new Dictionary <string, string>();
//catchTable.Add("catchmentID", catchmentID);
catchTable.Add("latitude", s.Centroid.X.ToString());
catchTable.Add("longitude", s.Centroid.Y.ToString());
catchTable.Add("cellArea", squareArea.ToString());
catchTable.Add("containedArea", interArea.ToString());
catchTable.Add("percentArea", percent2.ToString());
huc12Table.Add(catchTable);
}
}
huc8Table.Add(huc12Table);
}
infoTable.Add(huc8Table);
}
else //Huc ID
{
catchmentID = polyfile;
string ending = polyfile + ".zip";
WebClient client = new WebClient();
DirectoryInfo di = Directory.CreateDirectory(directory);
client.DownloadFile("ftp://newftp.epa.gov/exposure/NHDV1/HUC12_Boundries/" + ending, directory + ending);
string projfile = "";
string dataFile = "";
ZipFile.ExtractToDirectory(directory + ending, directory + polyfile);
string unzippedLocation = (directory + polyfile + "\\" + polyfile); //+ "\\NHDPlus" + polyfile + "\\Drainage");
foreach (string file in Directory.GetFiles(unzippedLocation))
{
if (Path.GetExtension(file).Equals(".shp"))
{
polyfile = file;
}
else if (Path.GetExtension(file).Equals(".prj"))
{
projfile = file;
}
else if (Path.GetExtension(file).Equals(".dbf"))
{
dataFile = file;
}
}
//This block is for setting projection parameters of input shapefile and projecting it to NLDAS grid
//Reprojecting of coordinates is not needed for NHDPlus V2
string line = System.IO.File.ReadAllText(projfile);
//string line = @"PROJCS[""unnamed"",GEOGCS[""unnamed ellipse"",DATUM[""unknown"",SPHEROID[""unnamed"",6378137,0]],PRIMEM[""Greenwich"",0],UNIT[""degree"",0.0174532925199433]],PROJECTION[""Mercator_2SP""],PARAMETER[""latitude_of_origin"",0],PARAMETER[""standard_parallel_1"",0],PARAMETER[""central_meridian"",0],PARAMETER[""false_easting"",0],PARAMETER[""false_northing"",0],UNIT[""Meter"",1]]";//System.IO.File.ReadAllText(projfile);
string[] projParams = { "PARAMETER", @"PARAMETER[""latitude_of_origin"",0]," };//@"PARAMETER[""false_easting"",0],", @"PARAMETER[""false_northing"",0],", @"PARAMETER[""central_meridian"",0],", @"PARAMETER[""standard_parallel_1"",0],", @"PARAMETER[""standard_parallel_2"",0],", @"PARAMETER[""latitude_Of_origin"",0]," };
int ptr = 0;
foreach (string x in projParams)
{
if (line.Contains(x))
{
ptr = line.IndexOf(x);
}
else if (!line.Contains(x) && !x.Equals("PARAMETER"))
{
line = line.Insert(ptr, x);
}
}
string line2 = System.IO.File.ReadAllText(gridproj);
IProjectedCoordinateSystem pcs = CoordinateSystemWktReader.Parse(line) as IProjectedCoordinateSystem;
IGeographicCoordinateSystem gcs = GeographicCoordinateSystem.WGS84 as IGeographicCoordinateSystem;
CoordinateTransformationFactory ctfac = new CoordinateTransformationFactory();
ICoordinateTransformation transformTo = ctfac.CreateFromCoordinateSystems(pcs, gcs);
IMathTransform inverseTransformTo = transformTo.MathTransform;
//Read geometries from both shapefiles and store in array lists
ShapefileDataReader reader = new ShapefileDataReader(polyfile, NetTopologySuite.Geometries.GeometryFactory.Default);
DbaseFileHeader header = reader.DbaseHeader;
string huc8 = "";
while (reader.Read())
{
//Reprojection not needed for NHDPLUSV2
CoordinateList cordlist = new CoordinateList();
foreach (Coordinate coord in reader.Geometry.Coordinates)
{
double[] newCoord = { coord.X, coord.Y };
newCoord = inverseTransformTo.Transform(newCoord);
Coordinate newpt = new Coordinate(newCoord[0], newCoord[1]);
cordlist.Add(newpt);
}
Coordinate[] listofpts = cordlist.ToCoordinateArray();
IGeometryFactory geoFactory = new NetTopologySuite.Geometries.GeometryFactory();
NetTopologySuite.Geometries.LinearRing linear = (NetTopologySuite.Geometries.LinearRing) new GeometryFactory().CreateLinearRing(listofpts);
Feature feature = new Feature();
AttributesTable attributesTable = new AttributesTable();
string[] keys = new string[header.NumFields];
IGeometry geometry = (Geometry)reader.Geometry;
for (int i = 0; i < header.NumFields; i++)
{
DbaseFieldDescriptor fldDescriptor = header.Fields[i];
keys[i] = fldDescriptor.Name;
attributesTable.AddAttribute(fldDescriptor.Name, reader.GetValue(i));
}
feature.Geometry = geometry;
feature.Attributes = attributesTable;
polyfeats.Add(feature.Attributes);
huc8 = attributesTable.GetValues()[5].ToString();
Polygon projPoly = new Polygon(linear, null, geoFactory);
polys.Add(projPoly);
polygonArea += projPoly.Area;
}
reader.Dispose();
List <Object> huc8Table = new List <Object>();
Dictionary <string, string> h8 = new Dictionary <string, string>();
h8.Add("HUC 8 ID: ", catchmentID);
huc8Table.Add(h8);
int j = 0;
foreach (Polygon p in polys)
{
List <Object> huc12Table = new List <Object>();
Dictionary <string, string> cm = new Dictionary <string, string>();
//
AttributesTable tab = (AttributesTable)polyfeats[j];
object[] valuesl = tab.GetValues();
cm.Add("HUC 12 ID: ", valuesl[17].ToString());
huc12Table.Add(cm);
//huc12Table.Add(new KeyValuePair<string, string>("HUC 12 ID: ", null));
catchmentID = null;//result[i].Attributes["OBJECTID"].ToString();
Dictionary <string, string> cm2 = new Dictionary <string, string>();
cm2.Add("Catchment ID: ", catchmentID);
huc12Table.Add(cm2);
//huc12Table.Add(new KeyValuePair<string, string>("Catchment ID: ", catchmentID));
foreach (GeoAPI.Geometries.IGeometry s in squares)
{
double interArea = 0.0;
squareArea = s.Area;
if (p.Intersects(s))
{
GeoAPI.Geometries.IGeometry intersection = p.Intersection(s);
interArea += intersection.Area;
double percent2 = (interArea / squareArea) * 100;
Dictionary <string, string> catchTable = new Dictionary <string, string>();
//catchTable.Add("catchmentID", catchmentID);
catchTable.Add("latitude", s.Centroid.X.ToString());
catchTable.Add("longitude", s.Centroid.Y.ToString());
catchTable.Add("cellArea", squareArea.ToString());
catchTable.Add("containedArea", interArea.ToString());
catchTable.Add("percentArea", percent2.ToString());
huc12Table.Add(catchTable);
}
}
huc8Table.Add(huc12Table);
j++;
}
infoTable.Add(huc8Table);
}
//System.IO.DirectoryInfo del = new DirectoryInfo(directory);
/*
* foreach (FileInfo file in del.GetFiles())
* {
* file.Delete();
* }
* foreach (DirectoryInfo dir in del.GetDirectories())
* {
* dir.Delete(true);
* }*/
//del.Delete(true);
return(infoTable);
}
public List <Object> CalculateDataTable(string polyfile)
{
//List<GeoAPI.Geometries.IGeometry> polys = new List<GeoAPI.Geometries.IGeometry>();
List <GeoAPI.Geometries.IGeometry> squares = new List <GeoAPI.Geometries.IGeometry>();
ArrayList polys = new ArrayList();
List <Object> infoTable = new List <Object>();
double squareArea = 0;//0.015625;
double gridArea = 0;
double polygonArea = 0;
string catchmentID = "";
//////////////
string gridfile = @"M:\DotSpatTopology\tests\NLDAS_Grid_Reference.shp";//"";
string gridproj = @"M:\DotSpatTopology\tests\NLDAS_Grid_Reference.prj";
//////////////
Guid gid = Guid.NewGuid();
string directory = @"M:\\TransientStorage\\" + gid.ToString() + "\\";
//This block is for getting and setting shapefiles for NLDAS Grid
/**
* client.DownloadFile("https://ldas.gsfc.nasa.gov/nldas/gis/NLDAS_Grid_Reference.zip", @"M:\\TransientStorage\\NLDAS.zip");
* ZipFile.ExtractToDirectory(@"M:\\TransientStorage\\NLDAS.zip", @"M:\\TransientStorage\\NLDAS");
* unzippedLocation = (@"M:\\TransientStorage\\NLDAS");
* foreach (string file in Directory.GetFiles(unzippedLocation))
* {
* if (Path.GetExtension(file).Equals(".shp"))
* {
* gridfile = file;
* }
* else if (Path.GetExtension(file).Equals(".prj"))
* {
* gridproj = file;
* }
* }
* client.Dispose();**/
ShapefileDataReader reader2 = new ShapefileDataReader(gridfile, NetTopologySuite.Geometries.GeometryFactory.Default);
while (reader2.Read())
{
squares.Add(reader2.Geometry);
gridArea += reader2.Geometry.Area;
}
reader2.Dispose();
//if (polyfile.StartsWith(@"{""type"": ""FeatureCollection"""))
if (polyfile.StartsWith(@"{""type"":"))//.geojson
{
Boolean version1 = true;
string[] featureParams = new string[3];
string jsonfile = polyfile;
var readera = new NetTopologySuite.IO.GeoJsonReader();
NetTopologySuite.Features.FeatureCollection result = readera.Read <NetTopologySuite.Features.FeatureCollection>(jsonfile);
if (result[0].Attributes.GetNames().Contains("HUC_8"))
{
version1 = false;
featureParams[0] = "OBJECTID";
featureParams[1] = "HUC_8";
featureParams[2] = "HUC_12";
}
else if (result[0].Attributes.GetNames().Contains("HUC8"))
{
version1 = true;
featureParams[0] = "COMID";
featureParams[1] = "HUC8";
featureParams[2] = "HUC12";
}
else
{
version1 = false;
featureParams[0] = null;
featureParams[1] = null;
featureParams[2] = null;
}
List <Object> huc8Table = new List <Object>();
huc8Table.Add(new KeyValuePair <string, string>("HUC 8 ID: ", result[0].Attributes[featureParams[1]].ToString()));
for (int i = 0; i < result.Count; i++)
{
List <Object> huc12Table = new List <Object>();
if (version1)
{
huc12Table.Add(new KeyValuePair <string, string>("HUC 12 ID: ", null));
}
else
{
huc12Table.Add(new KeyValuePair <string, string>("HUC 12 ID: ", result[i].Attributes["HUC_12"].ToString()));
}
catchmentID = result[i].Attributes[featureParams[0]].ToString();
huc12Table.Add(new KeyValuePair <string, string>("Catchment ID: ", catchmentID));
foreach (GeoAPI.Geometries.IGeometry s in squares)
{
double interArea = 0.0;
squareArea = s.Area;
if (result[i].Geometry.Intersects(s))
{
GeoAPI.Geometries.IGeometry intersection = result[i].Geometry.Intersection(s);
interArea += intersection.Area;
double percent2 = (interArea / squareArea) * 100;
Dictionary <string, string> catchTable = new Dictionary <string, string>();
//catchTable.Add("catchmentID", catchmentID);
catchTable.Add("latitude", s.Centroid.X.ToString());
catchTable.Add("longitude", s.Centroid.Y.ToString());
catchTable.Add("cellArea", squareArea.ToString());
catchTable.Add("containedArea", interArea.ToString());
catchTable.Add("percentArea", percent2.ToString());
huc12Table.Add(catchTable);
}
}
huc8Table.Add(huc12Table);
}
infoTable.Add(huc8Table);
}
else //Huc ID
{
catchmentID = polyfile;
string ending = polyfile + ".zip";
WebClient client = new WebClient();
DirectoryInfo di = Directory.CreateDirectory(directory);
client.DownloadFile("ftp://newftp.epa.gov/exposure/NHDV1/HUC12_Boundries/" + ending, directory + ending);
string projfile = "";
string dataFile = "";
ZipFile.ExtractToDirectory(directory + ending, directory + polyfile);
string unzippedLocation = (directory + polyfile + "\\" + polyfile); //+ "\\NHDPlus" + polyfile + "\\Drainage");
foreach (string file in Directory.GetFiles(unzippedLocation))
{
if (Path.GetExtension(file).Equals(".shp"))
{
polyfile = file;
}
else if (Path.GetExtension(file).Equals(".prj"))
{
projfile = file;
}
else if (Path.GetExtension(file).Equals(".dbf"))
{
dataFile = file;
}
}
//This block is for setting projection parameters of input shapefile and projecting it to NLDAS grid
//Reprojecting of coordinates is not needed for NHDPlus V2
string line = System.IO.File.ReadAllText(projfile);
string[] projParams = { "PARAMETER", @"PARAMETER[""latitude_Of_origin"",0]," };//@"PARAMETER[""false_easting"",0],", @"PARAMETER[""false_northing"",0],", @"PARAMETER[""central_meridian"",0],", @"PARAMETER[""standard_parallel_1"",0],", @"PARAMETER[""standard_parallel_2"",0],", @"PARAMETER[""latitude_Of_origin"",0]," };
int ptr = 0;
foreach (string x in projParams)
{
if (line.Contains(x))
{
ptr = line.IndexOf(x);
}
else if (!line.Contains(x) && !x.Equals("PARAMETER"))
{
line = line.Insert(ptr, x);
}
}
string line2 = System.IO.File.ReadAllText(gridproj);
IProjectedCoordinateSystem pcs = CoordinateSystemWktReader.Parse(line) as IProjectedCoordinateSystem;
IGeographicCoordinateSystem gcs = GeographicCoordinateSystem.WGS84 as IGeographicCoordinateSystem;
CoordinateTransformationFactory ctfac = new CoordinateTransformationFactory();
ICoordinateTransformation transformTo = ctfac.CreateFromCoordinateSystems(pcs, gcs);
IMathTransform inverseTransformTo = transformTo.MathTransform;
//Read geometries from both shapefiles and store in array lists
//As well as calculate shapefile areas ahead of time
ShapefileDataReader reader = new ShapefileDataReader(polyfile, NetTopologySuite.Geometries.GeometryFactory.Default);
while (reader.Read())
{
//Reprojection not needed for NHDPLUSV2
CoordinateList cordlist = new CoordinateList();
foreach (Coordinate coord in reader.Geometry.Coordinates)
{
double[] newCoord = { coord.X, coord.Y };
newCoord = inverseTransformTo.Transform(newCoord);
Coordinate newpt = new Coordinate(newCoord[0], newCoord[1]);
cordlist.Add(newpt);
}
Coordinate[] listofpts = cordlist.ToCoordinateArray();
IGeometryFactory geoFactory = new NetTopologySuite.Geometries.GeometryFactory();
NetTopologySuite.Geometries.LinearRing linear = (NetTopologySuite.Geometries.LinearRing) new GeometryFactory().CreateLinearRing(listofpts);
Polygon projPoly = new Polygon(linear, null, geoFactory);
polys.Add(projPoly);
polygonArea += projPoly.Area;
}
reader.Dispose();
List <Object> huc8Table = new List <Object>();
huc8Table.Add(new KeyValuePair <string, string>("HUC 8 ID: ", catchmentID));
foreach (Polygon p in polys)
{
List <Object> huc12Table = new List <Object>();
huc12Table.Add(new KeyValuePair <string, string>("HUC 12 ID: ", null));
catchmentID = null;//result[i].Attributes["OBJECTID"].ToString();
huc12Table.Add(new KeyValuePair <string, string>("Catchment ID: ", catchmentID));
foreach (GeoAPI.Geometries.IGeometry s in squares)
{
double interArea = 0.0;
squareArea = s.Area;
if (p.Intersects(s))
{
GeoAPI.Geometries.IGeometry intersection = p.Intersection(s);
interArea += intersection.Area;
double percent2 = (interArea / squareArea) * 100;
Dictionary <string, string> catchTable = new Dictionary <string, string>();
//catchTable.Add("catchmentID", catchmentID);
catchTable.Add("latitude", s.Centroid.X.ToString());
catchTable.Add("longitude", s.Centroid.Y.ToString());
catchTable.Add("cellArea", squareArea.ToString());
catchTable.Add("containedArea", interArea.ToString());
catchTable.Add("percentArea", percent2.ToString());
huc12Table.Add(catchTable);
}
}
huc8Table.Add(huc12Table);
}
infoTable.Add(huc8Table);
}
//System.IO.DirectoryInfo del = new DirectoryInfo(directory);
/*
* foreach (FileInfo file in del.GetFiles())
* {
* file.Delete();
* }
* foreach (DirectoryInfo dir in del.GetDirectories())
* {
* dir.Delete(true);
* }*/
//del.Delete(true);
/////
//infoTable.Add(new List<Object>() { elapsedTime, elapsedTime, elapsedTime, elapsedTime });
//////
return(infoTable);
}
private string ExtractWKTFromShapefileZip(Stream stream, int points)
{
string uid = Guid.NewGuid().ToString();
string path = AppDomain.CurrentDomain.BaseDirectory;
if (!path.EndsWith("/"))
{
path += "/";
}
var shapeDir = path + "files/" + uid;
if (stream.Length > 1 * 1000 * 1000)
{
throw new Exception("We only accept files < 1MB");
}
using (ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Read)) {
archive.ExtractToDirectory(shapeDir);
}
//get all .shp files in unziped directory
var myFiles = Directory.GetFiles(shapeDir, "*.shp", SearchOption.AllDirectories);
GeometryFactory factory = new GeometryFactory();
NetTopologySuite.Geometries.Geometry finalgeometry = null;
foreach (var shapefile in myFiles)
{
ShapefileDataReader shapeFileDataReader = new ShapefileDataReader(shapefile, factory);
while (shapeFileDataReader.Read())
{
var geometry = (NetTopologySuite.Geometries.Geometry)shapeFileDataReader.Geometry;
if (finalgeometry == null)
{
finalgeometry = geometry;
}
else
{
finalgeometry = finalgeometry.Union(geometry);
}
}
//Close and free up any resources
shapeFileDataReader.Close();
shapeFileDataReader.Dispose();
}
string wkt = null;
if (finalgeometry != null)
{
finalgeometry = SimplifyGeometry(finalgeometry, points);
foreach (var p in finalgeometry.Coordinates.ToArray())
{
p.X = Math.Round(p.X, 2);
p.Y = Math.Round(p.Y, 2);
if (p is CoordinateZ)
{
p.Z = Math.Round(p.Z, 2);
}
}
wkt = finalgeometry.AsText();
}
return(wkt);
}
