Your Name
134 lines
4.5 KiB
PHP
134 lines
4.5 KiB
PHP
<?php
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header('Content-Type: application/geo+json');
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header('Content-Disposition: attachment; filename="export.geojson"');
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require_once 'config.php';
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try {
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$db = getDB();
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// Get type parameter
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$type = isset($_GET['type']) ? $_GET['type'] : 'roads';
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// Validate type
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$valid_types = ['roads', 'parcels', 'pontianak_areas'];
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if (!in_array($type, $valid_types)) {
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throw new Exception('Invalid type. Must be: ' . implode(', ', $valid_types));
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}
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$features = [];
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if ($type === 'roads') {
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// Export roads as LineString features
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$stmt = $db->prepare('SELECT id, name, road_type, length_meters, condition_status, coordinates, created_at FROM roads');
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$stmt->execute();
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$roads = $stmt->fetchAll(PDO::FETCH_ASSOC);
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foreach ($roads as $road) {
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$coordinates = json_decode($road['coordinates'], true);
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// Convert [lat, lng] to [lng, lat] for GeoJSON
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$geojson_coords = [];
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foreach ($coordinates as $coord) {
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$geojson_coords[] = [$coord[1], $coord[0]];
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}
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$features[] = [
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'type' => 'Feature',
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'geometry' => [
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'type' => 'LineString',
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'coordinates' => $geojson_coords
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],
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'properties' => [
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'id' => $road['id'],
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'name' => $road['name'],
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'road_type' => $road['road_type'],
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'length_meters' => floatval($road['length_meters']),
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'length_km' => floatval($road['length_meters']) / 1000,
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'condition_status' => $road['condition_status'],
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'created_at' => $road['created_at']
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]
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];
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}
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} else if ($type === 'parcels') {
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// Export parcels as Polygon features
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$stmt = $db->prepare('SELECT id, name, certificate_type, area_sqm, coordinates, created_at FROM land_parcels');
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$stmt->execute();
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$parcels = $stmt->fetchAll(PDO::FETCH_ASSOC);
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foreach ($parcels as $parcel) {
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$coordinates = json_decode($parcel['coordinates'], true);
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// Convert [lat, lng] to [lng, lat] for GeoJSON
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$geojson_coords = [];
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foreach ($coordinates as $coord) {
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$geojson_coords[] = [$coord[1], $coord[0]];
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}
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// Close the polygon
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if ($geojson_coords[0] !== end($geojson_coords)) {
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$geojson_coords[] = $geojson_coords[0];
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}
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$features[] = [
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'type' => 'Feature',
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'geometry' => [
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'type' => 'Polygon',
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'coordinates' => [$geojson_coords]
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],
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'properties' => [
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'id' => $parcel['id'],
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'name' => $parcel['name'],
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'certificate_type' => $parcel['certificate_type'],
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'area_sqm' => floatval($parcel['area_sqm']),
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'area_hectares' => floatval($parcel['area_sqm']) / 10000,
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'created_at' => $parcel['created_at']
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]
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];
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}
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} else if ($type === 'pontianak_areas') {
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// Export Pontianak areas as features
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$stmt = $db->prepare('SELECT id, name, area_type, geometry, population FROM pontianak_areas ORDER BY area_type, name');
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$stmt->execute();
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$areas = $stmt->fetchAll(PDO::FETCH_ASSOC);
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foreach ($areas as $area) {
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$geometry = json_decode($area['geometry'], true);
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$features[] = [
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'type' => 'Feature',
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'geometry' => $geometry,
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'properties' => [
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'id' => $area['id'],
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'name' => $area['name'],
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'area_type' => $area['area_type'],
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'population' => intval($area['population'])
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]
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];
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}
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}
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// Build FeatureCollection
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$geojson = [
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'type' => 'FeatureCollection',
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'features' => $features
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];
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// Output GeoJSON
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echo json_encode($geojson, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
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} catch (PDOException $e) {
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http_response_code(500);
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echo json_encode([
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'success' => false,
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'error' => 'Database error: ' . $e->getMessage()
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]);
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} catch (Exception $e) {
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http_response_code(400);
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echo json_encode([
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'success' => false,
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'error' => $e->getMessage()
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]);
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}
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?>
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