static void TestCountryCenterAPI()
{
string countryCode = "NGA";
GeoPoint NigeriaCenter = GeoAPI.ReadGeoCenterPointByCountryKey(countryCode);
if (NigeriaCenter == null)
{
Console.WriteLine("failed to get country data for specified country code: {0}", countryCode);
return;
}
// access lat long data
LonLat NigeriaCenterLonLat = NigeriaCenter.GetData();
Console.WriteLine("Nigeria Center x = {0}, y = {1}", NigeriaCenterLonLat.longitude, NigeriaCenterLonLat.latitude);
bool saveSuccess = NigeriaCenter.saveToGeoJson("E:/Nigeria_Center.geojson");
if (!saveSuccess)
{
Console.WriteLine("failed to save");
}
}
static void TestCountryEnvelopeAPI()
{
string countryCode = "NGA";
GeoEnvelope NigeriaEnvelope = GeoAPI.ReadGeoEnvelopeByCountryKey(countryCode);
if (NigeriaEnvelope == null)
{
Console.WriteLine("failed to get country data for specified country code: {0}", countryCode);
return;
}
// access lat long data
List <LonLat> NigeriaEnvelopeLatLonArray = NigeriaEnvelope.GetData();
for (int i = 0; i < NigeriaEnvelopeLatLonArray.Count; i++)
{
LonLat lonlat = NigeriaEnvelopeLatLonArray[i];
Console.WriteLine("{0} th x = {1}, y = {2}", i, lonlat.longitude, lonlat.latitude);
}
// how to test result
// we can save result to geojson file, open it in GIS tool(for example QGIS) and view it.
bool saveSuccess = NigeriaEnvelope.saveToGeoJson("E:/Nigeria_Envelope.geojson");
if (!saveSuccess)
{
Console.WriteLine("failed to save Nigeria_Envelope.geojson");
}
}
static void TestCountryPolygonAPI()
{
// test polygon API
string countryCode = "NGA";
double simplifyTolerlance = 0.0;
GeoMultiPolygon fullNigeriaData = GeoAPI.ReadGeoPolygonByCountryKey(countryCode, simplifyTolerlance);
if (fullNigeriaData == null)
{
Console.WriteLine("failed to get country data for specified country code: {0}", countryCode);
return;
}
fullNigeriaData.saveToGeoJson("E:/Full_Nigeria.geojson");
simplifyTolerlance = 0.02;
GeoMultiPolygon simplifiedNigeriaDataPreserveTopology = GeoAPI.ReadGeoPolygonByCountryKey(countryCode, simplifyTolerlance);
if (simplifiedNigeriaDataPreserveTopology == null)
{
Console.WriteLine("failed to get country data for specified country code: {0}", countryCode);
return;
}
// access lat long data
for (int i = 0; i < simplifiedNigeriaDataPreserveTopology.GetData().Count; i++)
{
GeoPolygon polygon = simplifiedNigeriaDataPreserveTopology.GetData()[i];
for (int j = 0; j < polygon.GetData().Count; j++)
{
GeoLineString lineString = polygon.GetData()[j];
for (int k = 0; k < lineString.GetData().Count; k++)
{
LonLat lonlat = lineString.GetData()[k];
Console.WriteLine("{0}d th x = {1}, y = {2}", i, lonlat.longitude, lonlat.latitude);
}
}
}
// how to test result
// we can save result to geojson file, open it in GIS tool(for example QGIS) and view it.
bool saveSuccess = simplifiedNigeriaDataPreserveTopology.saveToGeoJson("E:/Simplified_Nigeria_0.02.geojson");
if (!saveSuccess)
{
Console.WriteLine("failed to save");
}
}
static void Main(string[] args)
{
// 1 configure API
String geopackagePath = "E:/0Task/GeoAPI/gadm36_levels.gpkg";
// geopackage file was downloaded from https://gadm.org/download_world.html
if (!GeoAPI.Configure(geopackagePath))
{
Console.WriteLine("failed to configure!");
return;
}
TestCountryCenterAPI();
TestCountryEnvelopeAPI();
TestCountryPolygonAPI();
TestRegionCenterAPI();
TestRegionEnvelopeAPI();
TestRegionPolygonAPI();
}