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$Geowithin Operator In Mongodb

In this article, we will discuss the $geowithin operator in MongoDB.

Purpose

The $geowithin operator is used to find documents with locations that fall within a particular area.

Creating The 2Dsphere Index

The first step is to create a 2dsphere index.

db.locations.createIndex({ location: "2dsphere" });

Example

Consider the following document: -

Picture showing the sample mongodb collection

To find the location of the polygon, we will use the following query: -

db.locations.find({
  location: {
    $geoWithin: {
      $geometry: {
        type: "Polygon",
        coordinates: [[
          [73.865, 18.522], // Bottom-left corner
          [73.865, 18.530], // Top-left corner
          [73.872, 18.530], // Top-right corner
          [73.872, 18.522], // Bottom-right corner
          [73.865, 18.522]  // Closing the polygon
        ]]
      }
    }
  }
})

Picture showing the output of $geowithin operator in mongodb

Posted By -	Karan Gupta

Posted On -	Saturday, May 25, 2024

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