{"type":"excalidraw","version":2,"source":"https://AwesomeSystemDesign.dev","elements":[{"angle":0,"strokeColor":"#6577aa","backgroundColor":"#eef1fc","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-1"}],"updated":0,"link":null,"locked":false,"id":"shape-0","type":"rectangle","seed":41,"x":36,"y":32,"width":367.27923999999996,"height":68,"customData":{"revealStep":1}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-1","type":"text","seed":114,"x":56,"y":54.3,"width":327.27923999999996,"height":23.400000000000002,"fontSize":18,"fontFamily":1,"text":"9q8yy0 | 9q8yy1 | 9q8yy4 | 9q8yy5","originalText":"9q8yy0 | 9q8yy1 | 9q8yy4 | 9q8yy5","textAlign":"center","verticalAlign":"middle","containerId":"shape-0","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":1}},{"angle":0,"strokeColor":"#628572","backgroundColor":"#edf5ee","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-2"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-3"}],"updated":0,"link":null,"locked":false,"id":"shape-2","type":"rectangle","seed":187,"x":443.27923999999996,"y":32,"width":374.0335600000001,"height":106.2,"customData":{"revealStep":2}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-2"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-3","type":"text","seed":260,"x":463.27923999999996,"y":50,"width":334.0335600000001,"height":70.2,"fontSize":18,"fontFamily":1,"text":"9q8yy2 | 9q8yy3 | 9q8yy6 | 9q8yy7\n\n(user)","originalText":"9q8yy2 | 9q8yy3 | 9q8yy6 | 9q8yy7\n\n(user)","textAlign":"center","verticalAlign":"middle","containerId":"shape-2","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":2}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-3"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-5"}],"updated":0,"link":null,"locked":false,"id":"shape-4","type":"rectangle","seed":333,"x":36,"y":178.2,"width":371.62948,"height":68,"customData":{"revealStep":3}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-3"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-5","type":"text","seed":406,"x":56,"y":200.5,"width":331.62948,"height":23.400000000000002,"fontSize":18,"fontFamily":1,"text":"9q8yy8 | 9q8yy9 | 9q8yyc | 9q8yyd","originalText":"9q8yy8 | 9q8yy9 | 9q8yyc | 9q8yyd","textAlign":"center","verticalAlign":"middle","containerId":"shape-4","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":3}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-4"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-7"}],"updated":0,"link":null,"locked":false,"id":"shape-6","type":"rectangle","seed":479,"x":36,"y":286.2,"width":420,"height":234.9,"customData":{"revealStep":4}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-4"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-7","type":"text","seed":552,"x":56,"y":304.2,"width":380,"height":198.9,"fontSize":17,"fontFamily":1,"text":"Geohash Grid (zoomed into a city)\n\nUser at 📍 searches radius 2 km:\n→ Look up geohash \"9q8yy3\" (user's cell)\n→ Also check 8 neighboring cells:\n9q8yy0, 9q8yy1, 9q8yy2, 9q8yy4, 9q8yy5,\n9q8yy6, 9q8yy8, 9q8yy9\n→ Fetch all businesses in these 9 cells\n→ Filter by exact distance ≤ 2 km","originalText":"Geohash Grid (zoomed into a city)\n\nUser at 📍 searches radius 2 km:\n→ Look up geohash \"9q8yy3\" (user's cell)\n→ Also check 8 neighboring cells:\n9q8yy0, 9q8yy1, 9q8yy2, 9q8yy4, 9q8yy5,\n9q8yy6, 9q8yy8, 9q8yy9\n→ Fetch all businesses in these 9 cells\n→ Filter by exact distance ≤ 2 km","textAlign":"left","verticalAlign":"middle","containerId":"shape-6","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":4}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-5"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-9"}],"updated":0,"link":null,"locked":false,"id":"shape-8","type":"rectangle","seed":625,"x":36,"y":545.0999999999999,"width":544.34376,"height":124.4,"customData":{"revealStep":5}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-5"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-9","type":"text","seed":698,"x":56,"y":563.0999999999999,"width":504.34376,"height":88.4,"fontSize":17,"fontFamily":1,"text":"How Geohashing Works:\nDivide the Earth's surface recursively into grid cells.\nEach cell gets a string code. Longer code = smaller\ncell.","originalText":"How Geohashing Works:\nDivide the Earth's surface recursively into grid cells.\nEach cell gets a string code. Longer code = smaller\ncell.","textAlign":"left","verticalAlign":"middle","containerId":"shape-8","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":5}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-6"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-11"}],"updated":0,"link":null,"locked":false,"id":"shape-10","type":"rectangle","seed":771,"x":36,"y":693.4999999999999,"width":514.80898,"height":212.8,"customData":{"revealStep":6}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-6"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-11","type":"text","seed":844,"x":56,"y":711.4999999999999,"width":474.80898,"height":176.8,"fontSize":17,"fontFamily":1,"text":"Level 1: Divide into 32 cells → 1 char (±2500 km)\nLevel 2: Each cell into 32 more → 2 chars (±630 km)\nLevel 3: Further subdivide → 3 chars (±78 km)\nLevel 4: → 4 chars (±20 km)\nLevel 5: → 5 chars (±2.4 km)\nLevel 6: → 6 chars (±610 m)\nLevel 7: → 7 chars (±76 m)\nLevel 8: → 8 chars (±19 m)","originalText":"Level 1: Divide into 32 cells → 1 char (±2500 km)\nLevel 2: Each cell into 32 more → 2 chars (±630 km)\nLevel 3: Further subdivide → 3 chars (±78 km)\nLevel 4: → 4 chars (±20 km)\nLevel 5: → 5 chars (±2.4 km)\nLevel 6: → 6 chars (±610 m)\nLevel 7: → 7 chars (±76 m)\nLevel 8: → 8 chars (±19 m)","textAlign":"left","verticalAlign":"middle","containerId":"shape-10","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":6}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-7"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-13"}],"updated":0,"link":null,"locked":false,"id":"shape-12","type":"rectangle","seed":917,"x":36,"y":930.3,"width":511.81766,"height":124.4,"customData":{"revealStep":7}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-7"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-13","type":"text","seed":990,"x":56,"y":948.3,"width":471.81766,"height":88.4,"fontSize":17,"fontFamily":1,"text":"Example:\nSan Francisco: 37.7749, -122.4194 → geohash \"9q8yyk\"\nNearby point: 37.7750, -122.4190 → geohash \"9q8yym\"\nSame prefix \"9q8yy\" → both in same level-5 cell","originalText":"Example:\nSan Francisco: 37.7749, -122.4194 → geohash \"9q8yyk\"\nNearby point: 37.7750, -122.4190 → geohash \"9q8yym\"\nSame prefix \"9q8yy\" → both in same level-5 cell","textAlign":"left","verticalAlign":"middle","containerId":"shape-12","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":7}}],"appState":{"viewBackgroundColor":"#fbfbf8","gridSize":null},"files":{}}