Hello everyone, I’m making a server in NestJS to get NDVI images of fields and the scripting of sentinel i used based on the request build, here is mine ndvi.service.ts:
import { SentinelAuthService } from 'src/sentinel-auth/sentinel-auth.service';
import { Injectable } from '@nestjs/common';
import {
S2L2ALayer,
setAuthToken,
ApiType,
MimeTypes,
CRS_EPSG4326,
BBox,
} from '@sentinel-hub/sentinelhub-js';
@Injectable()
export class NdviService {
constructor(private readonly sentinelAuthService: SentinelAuthService) {}
async getNdviData(
fieldLngLat: any,
fieldBbox: any,
fieldUuid: any,
): Promise<any> {
const authenticated = await this.sentinelAuthService.authenticate();
if (authenticated) {
const authToken = this.sentinelAuthService.getAuthToken();
// console.log('authToken ' + authToken);
setAuthToken(authToken);
const evalscript = `//VERSION=3
function setup() {
return {
input: :"NIR_Narrow", "Red", "dataMask"],
output: { bands: 4 }
};
}
function evaluatePixel(sample) {
var ndvi = (sample.NIR_Narrow - sample.Red) / (sample.NIR_Narrow + sample.Red)
if (ndvi < -1.1) return n0, 0, 0, sample.dataMask];
else if (ndvi < -0.2) return n0.75, 0.75, 0.75, sample.dataMask];
else if (ndvi < -0.1) return n0.86, 0.86, 0.86, sample.dataMask];
else if (ndvi < 0) return n1, 1, 0.88, sample.dataMask];
else if (ndvi < 0.025) return n1, 0.98, 0.8, sample.dataMask];
else if (ndvi < 0.05) return n0.93, 0.91, 0.71, sample.dataMask];
else if (ndvi < 0.075) return n0.87, 0.85, 0.61, sample.dataMask];
else if (ndvi < 0.1) return n0.8, 0.78, 0.51, sample.dataMask];
else if (ndvi < 0.125) return n0.74, 0.72, 0.42, sample.dataMask];
else if (ndvi < 0.15) return n0.69, 0.76, 0.38, sample.dataMask];
else if (ndvi < 0.175) return n0.64, 0.8, 0.35, sample.dataMask];
else if (ndvi < 0.2) return n0.57, 0.75, 0.32, sample.dataMask];
else if (ndvi < 0.25) return n0.5, 0.7, 0.28, sample.dataMask];
else if (ndvi < 0.3) return n0.44, 0.64, 0.25, sample.dataMask];
else if (ndvi < 0.35) return n0.38, 0.59, 0.21, sample.dataMask];
else if (ndvi < 0.4) return n0.31, 0.54, 0.18, sample.dataMask];
else if (ndvi < 0.45) return n0.25, 0.49, 0.14, sample.dataMask];
else if (ndvi < 0.5) return n0.19, 0.43, 0.1972, sample.dataMask];
else if (ndvi < 0.55) return n0.13, 0.38, 0.07, sample.dataMask];
else if (ndvi < 0.6) return n0.06, 0.33, 0.04, sample.dataMask];
else return n0, 0.27, 0, sample.dataMask];
}`;
const layer = new S2L2ALayer({
evalscript: evalscript,
maxCloudCoverage: '70',
harmonizeValues: 'true',
});
const getMapParams = {
bbox: new BBox(
CRS_EPSG4326,
-47.794306627870014,
-21.39866663394473,
-47.79084940434106,
-21.39531295351236,
),
fromTime: new Date('2023-08-27T00:00:00Z'),
toTime: new Date('2023-09-27T23:59:59Z'),
width: 512,
height: 533.426,
format: MimeTypes.PNG,
geometry: {
coordinates: :
-47.79250565561276, -21.39531295351236],
-47.79084940434106, -21.39657059268862],
-47.792441335175056, -21.39866663394473],
-47.794306627870014, -21.397154492914282],
-47.79250565561276, -21.39531295351236],
-47.79250565561276, -21.39531295351236],
],
],
type: 'Polygon',
},
};
const imageBlob = await layer.getMap(getMapParams, ApiType.PROCESSING);
return imageBlob;
} else {
console.log('auth failed');
}
}
}
but it returns 3 erros for me:
1-) on the layer constant the “maxCloudCoverage” returns an error related to type this one I did manage to find a solution when taking a look into sentinel files
2-) on the layer.getMap(getMapParams, …), it returns an error related to the type of the “geometry” key, specifically like this:
The argument of type '{ bbox: BBox; fromTime: Date; toTime: Date; width: number; height: number; format: MimeType | "JPEG_OR_PNG"; geometry: { coordinates: numbera]e]:]; type: string; }; }' is not assignable to the parameter of type 'GetMapParams'.
Property types 'geometry' are incompatible.
Type '{ coordinates: numbera]e]:]; type: string; }' cannot be assigned to type 'Polygon | MultiPolygon'.
Type '{ coordinates: numbera]e]:]; type: string; }' cannot be assigned to type 'MultiPolygon'.
Property types 'type' are incompatible.
Type 'string' cannot be assigned to type '"MultiPolygon"'.
3-) if i just take all the “geometry” key away an in the layer constant i just let the “evalscript” key, it still returns me an error 400 which I don’t undestand why since the script is basically the same as the request builder.
anyway if someone can help me with this I would be very grateful, and if you feel like i need to give some more information or if you have any tip on anything, please feel free to say it. Thanks!
