Membuat permintaan lapisan data

Kunci API

Untuk membuat permintaan ke URL dalam respons, tambahkan kunci API Anda ke URL:

curl -X GET "https://solar.googleapis.com/v1/dataLayers:get?location.latitude=37.4450&location.longitude=-122.1390&radiusMeters=100&view=FULL_LAYERS&requiredQuality=HIGH&exactQualityRequired=true&pixelSizeMeters=0.5&key=YOUR_API_KEY"

Anda juga dapat membuat permintaan HTTP dengan menempelkan URL di permintaan cURL ke kolom URL browser Anda. Meneruskan kunci API akan memberi Anda kemampuan penggunaan dan analisis yang lebih baik serta kontrol akses yang lebih baik ke data respons.

Token OAuth

Catatan: Format ini hanya untuk lingkungan pengujian. Untuk informasi lebih lanjut, lihat Menggunakan OAuth.

Untuk membuat permintaan ke URL dalam respons, teruskan nama project penagihan dan token OAuth Anda:

curl -H "Authorization: Bearer $(gcloud auth print-access-token)" \
  -H "X-Goog-User-Project: PROJECT_NUMBER_OR_ID" \
  "https://solar.googleapis.com/v1/dataLayers:get?location.latitude=37.4450&location.longitude=-122.1390&radius_meters=100&required_quality=HIGH&exactQualityRequired=true"
        

TypeScript

Untuk membuat permintaan ke URL dalam respons, sertakan kunci API atau token OAuth dalam permintaan. Contoh berikut menggunakan kunci API:

/**
 * Fetches the data layers information from the Solar API.
 *   https://developers.google.com/maps/documentation/solar/data-layers
 *
 * @param  {LatLng} location      Point of interest as latitude longitude.
 * @param  {number} radiusMeters  Radius of the data layer size in meters.
 * @param  {string} apiKey        Google Cloud API key.
 * @return {Promise<DataLayersResponse>}  Data Layers response.
 */
export async function getDataLayerUrls(
  location: LatLng,
  radiusMeters: number,
  apiKey: string,
): Promise<DataLayersResponse> {
  const args = {
    'location.latitude': location.latitude.toFixed(5),
    'location.longitude': location.longitude.toFixed(5),
    radius_meters: radiusMeters.toString(),
    // The Solar API always returns the highest quality imagery available.
    // By default the API asks for HIGH quality, which means that HIGH quality isn't available,
    // but there is an existing MEDIUM or LOW quality, it won't return anything.
    // Here we ask for *at least* LOW quality, but if there's a higher quality available,
    // the Solar API will return us the highest quality available.
    required_quality: 'LOW',
  };
  console.log('GET dataLayers\n', args);
  const params = new URLSearchParams({ ...args, key: apiKey });
  // https://developers.google.com/maps/documentation/solar/reference/rest/v1/dataLayers/get
  return fetch(`https://solar.googleapis.com/v1/dataLayers:get?${params}`).then(
    async (response) => {
      const content = await response.json();
      if (response.status != 200) {
        console.error('getDataLayerUrls\n', content);
        throw content;
      }
      console.log('dataLayersResponse', content);
      return content;
    },
  );
}
solar.ts

Kolom dan jenis data adalah "type" di TypeScript. Dalam contoh ini, kami menentukan jenis kustom untuk menyimpan kolom yang diinginkan dalam respons, seperti nilai piksel dan kotak pembatas lat/long. Anda dapat menyertakan kolom lainnya sesuai keinginan.

export interface GeoTiff {
  width: number;
  height: number;
  rasters: Array<number>[];
  bounds: Bounds;
}
solar.ts

export interface DataLayersResponse {
  imageryDate: Date;
  imageryProcessedDate: Date;
  dsmUrl: string;
  rgbUrl: string;
  maskUrl: string;
  annualFluxUrl: string;
  monthlyFluxUrl: string;
  hourlyShadeUrls: string[];
  imageryQuality: 'HIGH' | 'MEDIUM' | 'LOW';
}

export interface Bounds {
  north: number;
  south: number;
  east: number;
  west: number;
}

// https://developers.google.com/maps/documentation/solar/reference/rest/v1/buildingInsights/findClosest
export interface BuildingInsightsResponse {
  name: string;
  center: LatLng;
  boundingBox: LatLngBox;
  imageryDate: Date;
  imageryProcessedDate: Date;
  postalCode: string;
  administrativeArea: string;
  statisticalArea: string;
  regionCode: string;
  solarPotential: SolarPotential;
  imageryQuality: 'HIGH' | 'MEDIUM' | 'LOW';
}

export interface SolarPotential {
  maxArrayPanelsCount: number;
  panelCapacityWatts: number;
  panelHeightMeters: number;
  panelWidthMeters: number;
  panelLifetimeYears: number;
  maxArrayAreaMeters2: number;
  maxSunshineHoursPerYear: number;
  carbonOffsetFactorKgPerMwh: number;
  wholeRoofStats: SizeAndSunshineStats;
  buildingStats: SizeAndSunshineStats;
  roofSegmentStats: RoofSegmentSizeAndSunshineStats[];
  solarPanels: SolarPanel[];
  solarPanelConfigs: SolarPanelConfig[];
  financialAnalyses: object;
}

export interface SizeAndSunshineStats {
  areaMeters2: number;
  sunshineQuantiles: number[];
  groundAreaMeters2: number;
}

export interface RoofSegmentSizeAndSunshineStats {
  pitchDegrees: number;
  azimuthDegrees: number;
  stats: SizeAndSunshineStats;
  center: LatLng;
  boundingBox: LatLngBox;
  planeHeightAtCenterMeters: number;
}

export interface SolarPanel {
  center: LatLng;
  orientation: 'LANDSCAPE' | 'PORTRAIT';
  segmentIndex: number;
  yearlyEnergyDcKwh: number;
}

export interface SolarPanelConfig {
  panelsCount: number;
  yearlyEnergyDcKwh: number;
  roofSegmentSummaries: RoofSegmentSummary[];
}

export interface RoofSegmentSummary {
  pitchDegrees: number;
  azimuthDegrees: number;
  panelsCount: number;
  yearlyEnergyDcKwh: number;
  segmentIndex: number;
}

export interface LatLng {
  latitude: number;
  longitude: number;
}

export interface LatLngBox {
  sw: LatLng;
  ne: LatLng;
}

export interface Date {
  year: number;
  month: number;
  day: number;
}

export interface RequestError {
  error: {
    code: number;
    message: string;
    status: string;
  };
}
solar.ts

Kunci API

Untuk membuat permintaan ke URL dalam respons, tambahkan kunci API Anda ke URL:

curl -X GET "https://solar.googleapis.com/v1/solar/geoTiff:get?id=fbde33e9cd16d5fd10d19a19dc580bc1-8614f599c5c264553f821cd034d5cf32&key=YOUR_API_KEY"

Anda juga dapat membuat permintaan HTTP dengan menempelkan URL di permintaan cURL ke kolom URL browser Anda. Meneruskan kunci API akan memberi Anda kemampuan penggunaan dan analisis yang lebih baik serta kontrol akses yang lebih baik ke data respons.

Token OAuth

Untuk membuat permintaan ke URL dalam respons, teruskan nama project penagihan dan token OAuth Anda:

curl -X GET \
-H 'X-Goog-User-Project: PROJECT_NUMBER_OR_ID' \
-H "Authorization: Bearer $TOKEN" \
"https://solar.googleapis.com/v1/solar/geoTiff:get?id=fbde33e9cd16d5fd10d19a19dc580bc1-8614f599c5c264553f821cd034d5cf32"
        

TypeScript

Contoh berikut menunjukkan cara mendapatkan nilai data piksel (informasi yang disimpan dalam setiap piksel gambar digital, termasuk nilai warna dan atribut lainnya), menghitung lintang dan bujur dari GeoTIFF, dan menyimpannya dalam objek TypeScript.

Untuk contoh khusus ini, kami memilih untuk mengizinkan pemeriksaan jenis, yang mengurangi error jenis, menambah keandalan pada kode Anda, dan mempermudah pemeliharaan.

// npm install geotiff geotiff-geokeys-to-proj4 proj4

import * as geotiff from 'geotiff';
import * as geokeysToProj4 from 'geotiff-geokeys-to-proj4';
import proj4 from 'proj4';

/**
 * Downloads the pixel values for a Data Layer URL from the Solar API.
 *
 * @param  {string} url        URL from the Data Layers response.
 * @param  {string} apiKey     Google Cloud API key.
 * @return {Promise<GeoTiff>}  Pixel values with shape and lat/lon bounds.
 */
export async function downloadGeoTIFF(url: string, apiKey: string): Promise<GeoTiff> {
  console.log(`Downloading data layer: ${url}`);

  // Include your Google Cloud API key in the Data Layers URL.
  const solarUrl = url.includes('solar.googleapis.com') ? url + `&key=${apiKey}` : url;
  const response = await fetch(solarUrl);
  if (response.status != 200) {
    const error = await response.json();
    console.error(`downloadGeoTIFF failed: ${url}\n`, error);
    throw error;
  }

  // Get the GeoTIFF rasters, which are the pixel values for each band.
  const arrayBuffer = await response.arrayBuffer();
  const tiff = await geotiff.fromArrayBuffer(arrayBuffer);
  const image = await tiff.getImage();
  const rasters = await image.readRasters();

  // Reproject the bounding box into lat/lon coordinates.
  const geoKeys = image.getGeoKeys();
  const projObj = geokeysToProj4.toProj4(geoKeys);
  const projection = proj4(projObj.proj4, 'WGS84');
  const box = image.getBoundingBox();
  const sw = projection.forward({
    x: box[0] * projObj.coordinatesConversionParameters.x,
    y: box[1] * projObj.coordinatesConversionParameters.y,
  });
  const ne = projection.forward({
    x: box[2] * projObj.coordinatesConversionParameters.x,
    y: box[3] * projObj.coordinatesConversionParameters.y,
  });

  return {
    // Width and height of the data layer image in pixels.
    // Used to know the row and column since Javascript
    // stores the values as flat arrays.
    width: rasters.width,
    height: rasters.height,
    // Each raster reprents the pixel values of each band.
    // We convert them from `geotiff.TypedArray`s into plain
    // Javascript arrays to make them easier to process.
    rasters: [...Array(rasters.length).keys()].map((i) =>
      Array.from(rasters[i] as geotiff.TypedArray),
    ),
    // The bounding box as a lat/lon rectangle.
    bounds: {
      north: ne.y,
      south: sw.y,
      east: ne.x,
      west: sw.x,
    },
  };
}
solar.ts