How can I find coordinate of a location in Delphi

To find the coordinates (latitude and longitude) of a location in Delphi, you can use a geocoding service that converts a physical address or place name into geographic coordinates.

One way to do this is to use the Google Maps Geocoding API, which allows you to programmatically retrieve the latitude and longitude for a given address or place name. To use the Google Maps Geocoding API, you will need to sign up for a Google Cloud Platform account and obtain an API key.

Here is an example of how you can use the Google Maps Geocoding API in Delphi to find the coordinates of a location:

uses
  System.Net.HttpClient,
  System.Net.URLClient;

function GetCoordinates(address: string; var lat, lon: Double): Boolean;
var
  apiKey: string;
  url: string;
  response: string;
  client: THttpClient;
  stream: TMemoryStream;
  reader: TStreamReader;
begin
  Result := False;
  apiKey := ‘YOUR_API_KEY’;
  url := Format(‘https://maps.googleapis.com/maps/api/geocode/json?address=%s&key=%s’, [THttpClient.URLencode(address), apiKey]);

  client := THttpClient.Create;
  try
    stream := TMemoryStream.Create;
    try
      client.Get(url, stream);
      stream.Position := 0;
      reader := TStreamReader.Create(stream, TEncoding.UTF8);
      try
        response := reader.ReadToEnd;
      finally
        reader.Free;
      end;
    finally
      stream.Free;
    end;
  finally
    client.Free;
  end;

  // Parse the response to extract the latitude and longitude
  // …
end;

uses

System.Net.HttpClient,

System.Net.URLClient;

function GetCoordinates(address: string; var lat, lon: Double): Boolean;

var

apiKey: string;

url: string;

response: string;

client: THttpClient;

stream: TMemoryStream;

reader: TStreamReader;

begin

Result := False;

apiKey := ‘YOUR_API_KEY’;

url := Format(‘https://maps.googleapis.com/maps/api/geocode/json?address=%s&key=%s’, [THttpClient.URLencode(address), apiKey]);

client := THttpClient.Create;

try

stream := TMemoryStream.Create;

try

client.Get(url, stream);

stream.Position := 0;

reader := TStreamReader.Create(stream, TEncoding.UTF8);

try

response := reader.ReadToEnd;

finally

reader.Free;

end;

finally

stream.Free;

end;

finally

client.Free;

end;

// Parse the response to extract the latitude and longitude

// …

end;

This function takes in an address parameter, which is the physical address or place name for which you want to find the coordinates. It also takes in two variables lat and lon that will be used to store the latitude and longitude of the location. The function returns a Boolean value indicating whether it was able to successfully retrieve the coordinates.

To use this function, you would call it like this:

var
  lat, lon: Double;
  success: Boolean;
begin
  success := GetCoordinates(‘1600 Amphitheatre Parkway, Mountain View, CA’, lat, lon);
  if success then
    WriteLn(Format(‘Latitude: %f, Longitude: %f’, [lat, lon]));
end;

var

lat, lon: Double;

success: Boolean;

begin

success := GetCoordinates(‘1600 Amphitheatre Parkway, Mountain View, CA’, lat, lon);

if success then

WriteLn(Format(‘Latitude: %f, Longitude: %f’, [lat, lon]));

end;

This would retrieve the coordinates for the address “1600 Amphitheatre Parkway, Mountain View, CA”, which is the location of Google’s headquarters. The function would return the latitude and longitude of the location in the lat and lon variables, and the output would be something like:

Latitude: 37.422408, Longitude: -122.085609

1	Latitude: 37.422408, Longitude: –122.085609

How can I find coordinate of a location in Delphi

Comments

Leave a Reply Cancel reply