{"version":3,"sources":["../../index.ts"],"sourcesContent":["import { booleanIntersects as intersect } from \"@turf/boolean-intersects\";\nimport {\n  BBox,\n  Feature,\n  FeatureCollection,\n  MultiPolygon,\n  Polygon,\n  GeoJsonProperties,\n} from \"geojson\";\nimport {\n  convertLength,\n  featureCollection,\n  polygon,\n  Units,\n} from \"@turf/helpers\";\n/**\n * Creates a grid of rectangular polygons with width and height consistent in degrees\n *\n * @function\n * @param {BBox} bbox extent of grid in [minX, minY, maxX, maxY] order.  If the grid does not fill the bbox perfectly, it is centered.\n * @param {number} cellWidth width of each cell, in units\n * @param {number} cellHeight height of each cell, in units\n * @param {Object} [options={}] Optional parameters\n * @param {Units} [options.units='kilometers'] the units of the cell width and height value.\n * Supports all valid Turf {@link https://github.com/Turfjs/turf/blob/master/packages/turf-helpers/README_UNITS.md Units}.\n * If you are looking for rectangles with equal width and height in linear units (e.g. kilometers) this is not the module for you.\n * The cellWidth and cellHeight is converted from units provided to degrees internally, so the width and height of resulting polygons will be consistent only in degrees.\n * @param {Feature<Polygon|MultiPolygon>} [options.mask] if passed a Polygon or MultiPolygon,\n * the grid Points will be created only inside it\n * @param {Object} [options.properties={}] passed to each point of the grid\n * @returns {FeatureCollection<Polygon>} a grid of polygons\n * @example\n * var bbox = [-95, 30 ,-85, 40];\n * var cellWidth = 50;\n * var cellHeight = 20;\n * var options = {units: 'miles'};\n *\n * var rectangleGrid = turf.rectangleGrid(bbox, cellWidth, cellHeight, options);\n *\n * //addToMap\n * var addToMap = [rectangleGrid]\n */\nfunction rectangleGrid<P extends GeoJsonProperties = GeoJsonProperties>(\n  bbox: BBox,\n  cellWidth: number,\n  cellHeight: number,\n  options: {\n    units?: Units;\n    properties?: P;\n    mask?: Feature<Polygon | MultiPolygon> | Polygon | MultiPolygon;\n  } = {}\n): FeatureCollection<Polygon, P> {\n  // Containers\n  const results = [];\n  const west = bbox[0];\n  const south = bbox[1];\n  const east = bbox[2];\n  const north = bbox[3];\n\n  const bboxWidth = east - west;\n  const cellWidthDeg = convertLength(cellWidth, options.units, \"degrees\");\n\n  const bboxHeight = north - south;\n  const cellHeightDeg = convertLength(cellHeight, options.units, \"degrees\");\n\n  const columns = Math.floor(Math.abs(bboxWidth) / cellWidthDeg);\n  const rows = Math.floor(Math.abs(bboxHeight) / cellHeightDeg);\n\n  // if the grid does not fill the bbox perfectly, center it.\n  const deltaX = (bboxWidth - columns * cellWidthDeg) / 2;\n  const deltaY = (bboxHeight - rows * cellHeightDeg) / 2;\n\n  // iterate over columns & rows\n  let currentX = west + deltaX;\n  for (let column = 0; column < columns; column++) {\n    let currentY = south + deltaY;\n    for (let row = 0; row < rows; row++) {\n      const cellPoly = polygon(\n        [\n          [\n            [currentX, currentY],\n            [currentX, currentY + cellHeightDeg],\n            [currentX + cellWidthDeg, currentY + cellHeightDeg],\n            [currentX + cellWidthDeg, currentY],\n            [currentX, currentY],\n          ],\n        ],\n        options.properties\n      );\n      if (options.mask) {\n        if (intersect(options.mask, cellPoly)) {\n          results.push(cellPoly);\n        }\n      } else {\n        results.push(cellPoly);\n      }\n\n      currentY += cellHeightDeg;\n    }\n    currentX += cellWidthDeg;\n  }\n  return featureCollection(results);\n}\n\nexport { rectangleGrid };\nexport default rectangleGrid;\n"],"mappings":";AAAA,SAAS,qBAAqB,iBAAiB;AAS/C;AAAA,EACE;AAAA,EACA;AAAA,EACA;AAAA,OAEK;AA4BP,SAAS,cACP,MACA,WACA,YACA,UAII,CAAC,GAC0B;AAE/B,QAAM,UAAU,CAAC;AACjB,QAAM,OAAO,KAAK,CAAC;AACnB,QAAM,QAAQ,KAAK,CAAC;AACpB,QAAM,OAAO,KAAK,CAAC;AACnB,QAAM,QAAQ,KAAK,CAAC;AAEpB,QAAM,YAAY,OAAO;AACzB,QAAM,eAAe,cAAc,WAAW,QAAQ,OAAO,SAAS;AAEtE,QAAM,aAAa,QAAQ;AAC3B,QAAM,gBAAgB,cAAc,YAAY,QAAQ,OAAO,SAAS;AAExE,QAAM,UAAU,KAAK,MAAM,KAAK,IAAI,SAAS,IAAI,YAAY;AAC7D,QAAM,OAAO,KAAK,MAAM,KAAK,IAAI,UAAU,IAAI,aAAa;AAG5D,QAAM,UAAU,YAAY,UAAU,gBAAgB;AACtD,QAAM,UAAU,aAAa,OAAO,iBAAiB;AAGrD,MAAI,WAAW,OAAO;AACtB,WAAS,SAAS,GAAG,SAAS,SAAS,UAAU;AAC/C,QAAI,WAAW,QAAQ;AACvB,aAAS,MAAM,GAAG,MAAM,MAAM,OAAO;AACnC,YAAM,WAAW;AAAA,QACf;AAAA,UACE;AAAA,YACE,CAAC,UAAU,QAAQ;AAAA,YACnB,CAAC,UAAU,WAAW,aAAa;AAAA,YACnC,CAAC,WAAW,cAAc,WAAW,aAAa;AAAA,YAClD,CAAC,WAAW,cAAc,QAAQ;AAAA,YAClC,CAAC,UAAU,QAAQ;AAAA,UACrB;AAAA,QACF;AAAA,QACA,QAAQ;AAAA,MACV;AACA,UAAI,QAAQ,MAAM;AAChB,YAAI,UAAU,QAAQ,MAAM,QAAQ,GAAG;AACrC,kBAAQ,KAAK,QAAQ;AAAA,QACvB;AAAA,MACF,OAAO;AACL,gBAAQ,KAAK,QAAQ;AAAA,MACvB;AAEA,kBAAY;AAAA,IACd;AACA,gBAAY;AAAA,EACd;AACA,SAAO,kBAAkB,OAAO;AAClC;AAGA,IAAO,8BAAQ;","names":[]}