Creating a circle and detect what is it contain

Mostafa20015 · July 2, 2018, 4:26am

Hello all ,
i need to create a circle using a longitude and latitude and get all points this circle contain and make some calculations to these points

thanks

Ethan · July 2, 2018, 5:07am

Hi Mostafa,

You can create a ellipse shape, and then use spatial query to get all features included in it.

Please refer the HowDoI sample, you can find the SpatialQueryAFeatureLayer sample here:

github.com

ThinkGeo/HowDoISample-ForWinForms/blob/master/HowDoI/Querying Feature Layers/SpatialQueryAFeatureLayer.cs

/*===========================================
    Backgrounds for this sample are powered by ThinkGeo Cloud Maps and require
    a Client ID and Secret. These were sent to you via email when you signed up
    with ThinkGeo, or you can register now at https://cloud.thinkgeo.com.
===========================================*/

using System;
using System.Collections.ObjectModel;
using System.Windows.Forms;
using ThinkGeo.MapSuite;
using ThinkGeo.MapSuite.Drawing;
using ThinkGeo.MapSuite.Layers;
using ThinkGeo.MapSuite.Shapes;
using ThinkGeo.MapSuite.Styles;
using ThinkGeo.MapSuite.WinForms;

namespace CSHowDoISamples
{
    public class SpatialQueryAFeatureLayer : UserControl
    {

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And the containing should be what you want.

Wish that’s helpful.

Regards,

Ethan

Mostafa20015 · July 2, 2018, 6:58am

Ethan
i appreciate your help , Thanks

i have another problem , i already have a drawn point but i don’t know how to get it’s longitude and latitude to use them for circle center

Ethan · July 2, 2018, 9:02am

Hi Mostafa,

Your other topic should asked the same question, so please refer the sample: https://github.com/ThinkGeo/GetFeaturesClickedOnSample-ForWinForms

It should be helpful.

Regards,

Ethan