refactored program

FarmmapsNbs/FarmmapsNbs.csproj

@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>netcoreapp3.0</TargetFramework>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <None Update="appsettings.json">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
+      <None Update="Data\**\*">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\FarmmapsApi\FarmmapsApi.csproj" />
+    </ItemGroup>
+
+</Project>

FarmmapsNbs/HerbicideService.cs

@@ -0,0 +1,250 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using FarmmapsApi.Models;
+using FarmmapsApi.Services;
+using FarmmapsApiSamples.Models;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using static FarmmapsApi.Extensions;
+using static FarmmapsApiSamples.Constants;
+
+namespace FarmmapsApiSamples
+{
+    public class HerbicideService
+    {
+        private readonly ILogger<HerbicideService> _logger;
+        private readonly FarmmapsApiService _farmmapsApiService;
+        private readonly GeneralService _generalService;
+
+        private HerbicideAgent liberatorTarweAgent;
+        private readonly string _downloadFolder = "Downloads";
+
+        public HerbicideService(ILogger<HerbicideService> logger, FarmmapsApiService farmmapsApiService,
+            GeneralService generalService)
+        {
+            _logger = logger;
+            _farmmapsApiService = farmmapsApiService;
+            _generalService = generalService;
+
+            liberatorTarweAgent = new HerbicideAgent()
+            {
+                Middel = "Liberator",
+                Grondsoort = "Klei",
+                ExtraProductType = "OS",
+                ActieveStofGehalte = "diflu100+flufenacet400",
+                MinDosis = 0.33f,
+                MaxDosis = 0.6f,
+                A = 0.007f,
+                B = 0.25f,
+                C = 1.05f,
+                D = 97f,
+                E = 3f,
+                P = 1f,
+                Gewas = "Tarwe",
+                Opmerking = "Org. stof arme grond",
+                TankMix = string.Empty
+            };
+        }
+
+        public async Task TestFlow(List<UserRoot> roots)
+        {
+            if (!Directory.Exists(_downloadFolder))
+                Directory.CreateDirectory(_downloadFolder);
+                
+//            await SingleLutumTiffFlow(roots);
+            await MultiVanDenBorneShapeFlow(roots);
+        }
+
+        private async Task SingleLutumTiffFlow(List<UserRoot> roots)
+        {
+            var myDrive = roots.SingleOrDefault(r => r.Name == "My drive");
+            if (myDrive == null)
+            {
+                _logger.LogError("Could not find a needed root item");
+                return;
+            }
+
+            var uploadedRoot = roots.SingleOrDefault(r => r.Name == "Uploaded");
+            if (uploadedRoot == null)
+            {
+                _logger.LogError("Could not find a needed root item");
+                return;
+            }
+            
+            _logger.LogInformation("Creating cropfield");
+            var cropfieldItem = await CreateCropfieldSingleLutumItemAsync(myDrive.Code);
+            
+            _logger.LogInformation("Uploading data");
+            var filePath = Path.Combine("Data", "Herbicide", "Lutum.tiff");
+            var inputItem = await _generalService.UploadDataAsync(uploadedRoot, GEOTIFF_PROCESSED_ITEMTYPE, filePath, "Lutum.tiff");
+            if(inputItem == null)
+            {
+                _logger.LogError($"Failed to upload data");
+                return;
+            }
+
+            _logger.LogInformation("Calculating appliance map");
+            var applianceMapItem = await CalculateApplianceMapAsync(cropfieldItem, liberatorTarweAgent, inputItem);
+            if (applianceMapItem == null)
+            {
+                return;
+            }
+            
+            _logger.LogInformation("Downloading appliance map");
+            await _farmmapsApiService.DownloadItemAsync(applianceMapItem.Code, Path.Combine(_downloadFolder, 
+                $"{applianceMapItem.Name}_{Guid.NewGuid():N}.zip"));
+        }
+
+        private async Task MultiVanDenBorneShapeFlow(List<UserRoot> roots)
+        {
+            var myDrive = roots.SingleOrDefault(r => r.Name == "My drive");
+            if (myDrive == null)
+            {
+                _logger.LogError("Could not find a needed root item");
+                return;
+            }
+
+            var uploadedRoot = roots.SingleOrDefault(r => r.Name == "Uploaded");
+            if (uploadedRoot == null)
+            {
+                _logger.LogError("Could not find a needed root item");
+                return;
+            }
+            
+            _logger.LogInformation("Creating cropfield");
+            var cropfieldItem = await CreateCropfieldVanDenBorneAsync(myDrive.Code);
+            
+            // upload data
+            _logger.LogInformation("Uploading lutum data");
+            var inputItem = await _generalService.UploadZipWithShapeAsync(uploadedRoot, 
+                Path.Combine("Data", "Herbicide", "vd_born_lutum.zip"), "Lutum");
+            if(inputItem == null)
+            {
+                _logger.LogError($"Failed to upload lutum data");
+                return;
+            }
+            
+            _logger.LogInformation("Uploading organic matter data");
+            var inputExtraItem = await _generalService.UploadZipWithShapeAsync(uploadedRoot, 
+                Path.Combine("Data", "Herbicide", "vd_born_om.zip"), "OS");
+            if(inputExtraItem == null)
+            {
+                _logger.LogError($"Failed to upload organic matter data");
+                return;
+            }
+            
+            // transform shape to geotiff as nbstask only supports tiff input item
+            var tiffInputItem = await _generalService.ShapeToGeotiff(inputItem);
+            if (tiffInputItem == null)
+            {
+                _logger.LogError($"Failed to convert shape to tiff for inputItem");
+                return;
+            }
+            
+            var tiffInputExtraItem = await _generalService.ShapeToGeotiff(inputExtraItem);
+            if (tiffInputExtraItem == null)
+            {
+                _logger.LogError($"Failed to convert shape to tiff for inputExtraItem");
+                return;
+            }
+            
+            // create appliance map
+            _logger.LogInformation("Calculating appliance map");
+            var applianceMapItem = await CalculateApplianceMapAsync(cropfieldItem, liberatorTarweAgent, tiffInputItem, tiffInputExtraItem);
+            if (applianceMapItem == null)
+            {
+                return;
+            }
+            
+            _logger.LogInformation("Downloading appliance map");
+            await _farmmapsApiService.DownloadItemAsync(applianceMapItem.Code, Path.Combine(_downloadFolder, 
+                $"{applianceMapItem.Name}_{Guid.NewGuid():N}.zip"));
+        }
+
+        private async Task<Item> CreateCropfieldSingleLutumItemAsync(string parentItemCode)
+        {
+            var currentYear = new DateTime(DateTime.UtcNow.Year, 1, 1);
+            var cropfieldItemRequest = new ItemRequest()
+            {
+                ParentCode = parentItemCode,
+                ItemType = CROPFIELD_ITEMTYPE,
+                Name = "Cropfield VRA Herbicide LUTUM",
+                DataDate = currentYear,
+                DataEndDate = currentYear.AddMonths(3),
+                Data = JObject.Parse("{}"),
+                Geometry = JObject.Parse(
+                    @"{""type"":""Polygon"",""coordinates"":[[[4.617786844284247,52.22533706956424],[4.618642601314543,52.225938364585989],[4.6192153806397,52.22563988897754],[4.619192414656403,52.2256242822442],[4.620306732153958,52.225031745661528],[4.620542019225217,52.22519855319158],[4.621157509147853,52.22487436515405],[4.623387917230182,52.22367660757213],[4.624563444939009,52.22304740241544],[4.624562779355982,52.223046635247019],[4.624534908813479,52.22302596787506],[4.627873021330343,52.221240670658399],[4.627504935938338,52.220104419135129],[4.627324878706837,52.22020569669098],[4.627320696113512,52.22020660117888],[4.626707169518044,52.22053923770041],[4.624700376420229,52.221619047547488],[4.623471571183885,52.22227447969577],[4.623471511010673,52.22227500174403],[4.623468838689317,52.22228052566992],[4.617786844284247,52.22533706956424]]]}")
+            };
+
+            return await _farmmapsApiService.CreateItemAsync(cropfieldItemRequest);
+        }
+        
+        private async Task<Item> CreateCropfieldVanDenBorneAsync(string parentItemCode)
+        {
+            var currentYear = new DateTime(DateTime.UtcNow.Year, 1, 1);
+            var cropfieldItemRequest = new ItemRequest()
+            {
+                ParentCode = parentItemCode,
+                ItemType = CROPFIELD_ITEMTYPE,
+                Name = "Cropfield VRA Herbicide van den borne",
+                DataDate = currentYear,
+                DataEndDate = currentYear.AddMonths(3),
+                Data = JObject.Parse("{}"),
+                Geometry = JObject.Parse(
+                    @"{ ""type"": ""Polygon"", ""coordinates"": [ [ [ 5.833813406930386, 52.662044400144573 ], [ 5.835448040282574, 52.662663232992713 ], [ 5.836017878606523, 52.662878934715643 ], [ 5.836051608552347, 52.66284538659815 ], [ 5.836752490453029, 52.662168665385018 ], [ 5.837926180228544, 52.662604908046319 ], [ 5.839506445610824, 52.661074514977884 ], [ 5.839509138399547, 52.661071906335934 ], [ 5.83609382583743, 52.659780657270744 ], [ 5.834864415345847, 52.661000863063798 ], [ 5.833813406930386, 52.662044400144573 ] ] ] }")
+            };
+
+            return await _farmmapsApiService.CreateItemAsync(cropfieldItemRequest);
+        }
+
+        private async Task<Item> CalculateApplianceMapAsync(Item cropfieldItem, HerbicideAgent agent, params Item[] inputItem)
+        {
+            if (inputItem.Length == 0)
+                return null;
+            
+            var taskRequest = new TaskRequest()
+            {
+                TaskType = "vnd.farmmaps.task.vraherbicide"
+            };
+            taskRequest.attributes["inputCode"] = inputItem[0].Code;
+            taskRequest.attributes["agent"] = JsonConvert.SerializeObject(agent);
+
+            if (inputItem.Length > 1)
+                taskRequest.attributes["extraInputCode"] = inputItem[1].Code;
+
+            var taskCode = await _farmmapsApiService.QueueTaskAsync(cropfieldItem.Code, taskRequest);
+            await PollTask(TimeSpan.FromSeconds(3), async (tokenSource) =>
+            {
+                _logger.LogInformation("Checking vraherbicide task status");
+                var itemTaskStatus = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, taskCode);
+                if (itemTaskStatus.IsFinished)
+                    tokenSource.Cancel();
+            });
+            
+            var itemTask = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, taskCode);
+            if (itemTask.State == ItemTaskState.Error)
+            {
+                _logger.LogError($"Something went wrong with task execution: {itemTask.Message}");
+                return null;
+            }
+
+            var itemName = $"VRAHerbicide {agent.Middel}";
+            var applianceMapItem = await _generalService.FindChildItemAsync(cropfieldItem.Code,
+                GEOTIFF_PROCESSED_ITEMTYPE, itemName, 
+                i => i.Updated >= itemTask.Finished.GetValueOrDefault(DateTime.UtcNow) &&
+                            i.Name.ToLower().Contains(itemName.ToLower()));
+            
+            if (applianceMapItem == null)
+            {
+                _logger.LogError("Could not find the VRAHerbicide geotiff child item under cropfield");
+                return null;
+            }
+
+            return applianceMapItem;
+        }
+    }
+}

FarmmapsNbs/Models/HerbicideAgent.cs

@@ -0,0 +1,22 @@
+namespace FarmmapsApiSamples.Models
+{
+    public class HerbicideAgent
+    {
+        public string ProductType { get; set; }
+        public string Middel { get; set; }
+        public string Grondsoort { get; set; }
+        public string ActieveStofGehalte{ get; set; }
+        public string Gewas { get; set; }
+        public string Opmerking { get; set; }
+        public string TankMix { get; set; }
+        public string ExtraProductType { get; set; }
+        public float MinDosis { get; set; }
+        public float MaxDosis { get; set; }
+        public float A { get; set; }
+        public float B { get; set; }
+        public float C { get; set; }
+        public float D { get; set; }
+        public float E { get; set; }
+        public float P { get; set; }
+    }
+}

FarmmapsNbs/NbsApplication.cs

@@ -0,0 +1,107 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using FarmmapsApi;
+using FarmmapsApi.Services;
+using Microsoft.Extensions.Logging;
+
+namespace FarmmapsApiSamples
+{
+    public class NbsApplication : IApplication
+    {
+        private const string DownloadFolder = "Downloads";
+
+        private readonly ILogger<NbsApplication> _logger;
+        private readonly FarmmapsApiService _farmmapsApiService;
+        private readonly FarmmapsEventHub _farmmapsEventHub;
+        private readonly NitrogenService _nitrogenService;
+        private readonly GeneralService _generalService;
+
+        public NbsApplication(ILogger<NbsApplication> logger, FarmmapsApiService farmmapsApiService,
+            GeneralService generalService, NitrogenService nitrogenService)
+        {
+            _logger = logger;
+            _farmmapsApiService = farmmapsApiService;
+            _generalService = generalService;
+            _nitrogenService = nitrogenService;
+        }
+
+        public async Task RunAsync()
+        {
+            try
+            {
+                // !! this call is needed the first time an api is called with a fresh clientid and secret !!
+                await _farmmapsApiService.GetCurrentUserCodeAsync();
+                var roots = await _farmmapsApiService.GetCurrentUserRootsAsync();
+
+                if (!Directory.Exists(DownloadFolder))
+                    Directory.CreateDirectory(DownloadFolder);
+
+                var plantingDate = new DateTime(DateTime.UtcNow.Year, 2, 1);
+                var measurementDate = plantingDate.AddMonths(5);
+
+                var uploadedRoot = roots.SingleOrDefault(r => r.Name == "Uploaded");
+                if (uploadedRoot == null)
+                {
+                    _logger.LogError("Could not find a needed root item");
+                    return;
+                }
+
+                var myDriveRoot = roots.SingleOrDefault(r => r.Name == "My drive");
+                if (myDriveRoot == null)
+                {
+                    _logger.LogError("Could not find a needed root item");
+                    return;
+                }
+
+                var cropfieldItem = await _generalService.CreateCropfieldItemAsync(myDriveRoot.Code, "VRA NBS cropfield", 2020,
+                    @"{ ""type"": ""Polygon"", ""coordinates"": [ [ [ 3.40843828875524, 50.638966444680605 ], [ 3.408953272886064, 50.639197789621612 ], [ 3.409242951459603, 50.639469958681836 ], [ 3.409328782148028, 50.639612846807708 ], [ 3.409457528180712, 50.639789755314411 ], [ 3.409639918393741, 50.640014292074966 ], [ 3.409833037442765, 50.640211611372706 ], [ 3.410069071836049, 50.640395321698435 ], [ 3.410380208081761, 50.640572227259661 ], [ 3.410605513638958, 50.640715112034222 ], [ 3.411925160474145, 50.641177783561204 ], [ 3.411935889310142, 50.640728720085136 ], [ 3.412590348309737, 50.63948356709389 ], [ 3.413244807309242, 50.638224772339846 ], [ 3.413400375432099, 50.637901562841307 ], [ 3.413539850300779, 50.637449065809889 ], [ 3.413475477284437, 50.637418445552932 ], [ 3.40999396998362, 50.637449065810451 ], [ 3.409940325803365, 50.638102293212661 ], [ 3.409575545377398, 50.638483338338325 ], [ 3.409060561246574, 50.638707881340494 ], [ 3.40843828875524, 50.638966444680605 ] ] ] }");
+
+                var dataPath = Path.Combine("Data", "Nbs", "Scan_1_20190605.zip");
+                var isariaShapeItem =
+                    await _generalService.UploadZipWithShapeAsync(uploadedRoot, dataPath, "Scan_1_20190605");
+                if (isariaShapeItem == null)
+                {
+                    _logger.LogError("Could not find isaria shape item");
+                    return;
+                }
+
+                _logger.LogInformation($"Converting shape to geotiff");
+                var isariaGeotiffItem = await _generalService.ShapeToGeotiff(isariaShapeItem);
+                if (isariaGeotiffItem == null)
+                {
+                    _logger.LogError("Something went wrong with isaria shape to geotiff transformation");
+                    return;
+                }
+
+                _logger.LogInformation($"Calculating targetN with targetYield: {60}");
+                var targetNItem = await _nitrogenService.CreateTargetNItem(cropfieldItem);
+                var targetN = await _nitrogenService.CalculateTargetN(cropfieldItem, targetNItem, plantingDate, measurementDate,
+                    "consumption", "irmi", 60);
+                _logger.LogInformation($"TargetN: {targetN}");
+
+                _logger.LogInformation("Calculating uptake map");
+                var uptakeMapItem =
+                    await _nitrogenService.CalculateUptakeMap(cropfieldItem, isariaGeotiffItem, plantingDate, measurementDate);
+
+                _logger.LogInformation("Downloading uptake map");
+                await _farmmapsApiService.DownloadItemAsync(uptakeMapItem.Code,
+                    Path.Combine(DownloadFolder, $"{uptakeMapItem.Name}.zip"));
+
+                _logger.LogInformation("Calculating appliance map");
+                var applianceMapItem =
+                    await _nitrogenService.CalculateApplicationMap(cropfieldItem, isariaGeotiffItem, plantingDate, measurementDate,
+                        "irmi", targetN);
+
+                _logger.LogInformation("Downloading appliance map");
+                await _farmmapsApiService.DownloadItemAsync(applianceMapItem.Code,
+                    Path.Combine(DownloadFolder, $"{applianceMapItem.Name}.zip"));
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex.Message);
+            }
+        }
+    }
+}

FarmmapsNbs/NitrogenService.cs

@@ -0,0 +1,184 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using FarmmapsApi.Models;
+using FarmmapsApi.Services;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json.Linq;
+using static FarmmapsApi.Extensions;
+using static FarmmapsApiSamples.Constants;
+
+namespace FarmmapsApiSamples
+{
+    public class NitrogenService
+    {
+        private readonly ILogger<NitrogenService> _logger;
+        private readonly FarmmapsApiService _farmmapsApiService;
+        private readonly GeneralService _generalService;
+
+        public NitrogenService(ILogger<NitrogenService> logger, FarmmapsApiService farmmapsApiService,
+            GeneralService generalService)
+        {
+            _logger = logger;
+            _farmmapsApiService = farmmapsApiService;
+            _generalService = generalService;
+        }
+
+        public async Task<Item> CreateTargetNItem(Item cropfieldItem)
+        {
+            var itemRequest = new ItemRequest()
+            {
+                ParentCode = cropfieldItem.ParentCode,
+                ItemType = USERINPUT_ITEMTYPE,
+                Name = "TargetN"
+            };
+            return await _farmmapsApiService.CreateItemAsync(itemRequest);
+        }
+        
+        /// <summary>
+        /// Calculates TargetN, makes the assumption the cropfield and user.input(targetn) item have the same parent
+        /// </summary>
+        /// <param name="cropfieldItem">The cropfield to base the calculations on</param>
+        /// <param name="targetYield">The target yield input for the TargetN calculation</param>
+        /// <param name="plantingDate">The date the crop is planted</param>
+        /// <param name="measurementDate">The date the measurements are taken</param>
+        /// <returns>The TargetN</returns>
+        public async Task<double> CalculateTargetN(Item cropfieldItem, Item targetNItem, DateTime plantingDate, 
+            DateTime measurementDate, string inputType, string purposeType, int targetYield)
+        {
+            var nbsTargetNRequest = new TaskRequest {TaskType = VRANBS_TASK};
+            nbsTargetNRequest.attributes["operation"] = "targetn";
+            nbsTargetNRequest.attributes["inputCode"] = targetNItem.Code;
+            nbsTargetNRequest.attributes["plantingDate"] = plantingDate.ToString();
+            nbsTargetNRequest.attributes["measurementDate"] = measurementDate.ToString();
+            nbsTargetNRequest.attributes["inputType"] = inputType;
+            nbsTargetNRequest.attributes["purposeType"] = purposeType.ToLower();
+            nbsTargetNRequest.attributes["targetYield"] = targetYield.ToString();
+            string itemTaskCode = await _farmmapsApiService.QueueTaskAsync(cropfieldItem.Code, nbsTargetNRequest);
+            
+            await PollTask(TimeSpan.FromSeconds(3), async (tokenSource) =>
+            {
+                var itemTaskStatus = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, itemTaskCode);
+                if (itemTaskStatus.IsFinished)
+                    tokenSource.Cancel();
+            });
+
+            var itemTask = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, itemTaskCode);
+            if(itemTask.State == ItemTaskState.Error)
+            {
+                _logger.LogError($"Something went wrong with task execution: {itemTask.Message}");
+                return 0;
+            }
+            
+            var item = await _farmmapsApiService.GetItemAsync(targetNItem.Code);
+            if (item.Data.ContainsKey("TargetN"))
+                return item.Data.Value<double>("TargetN");
+
+            return 0;
+        }
+        
+        /// <summary>
+        /// Calculates the uptake map based on the given inputs
+        /// </summary>
+        /// <param name="cropfieldItem">The cropfield to base the calculations on</param>
+        /// <param name="inputItem"></param>
+        /// <param name="plantingDate">The date the crop is planted</param>
+        /// <param name="measurementDate">The date the measurements are taken</param>
+        /// <returns></returns>
+        public async Task<Item> CalculateUptakeMap(Item cropfieldItem, Item inputItem, DateTime plantingDate, 
+            DateTime measurementDate, string inputType = "irmi")
+        {
+            var nbsUptakeMapRequest = new TaskRequest {TaskType = VRANBS_TASK};
+            nbsUptakeMapRequest.attributes["operation"] = "uptake";
+            nbsUptakeMapRequest.attributes["inputCode"] = inputItem.Code;
+            nbsUptakeMapRequest.attributes["plantingDate"] = plantingDate.ToString();
+            nbsUptakeMapRequest.attributes["measurementDate"] = measurementDate.ToString();
+            nbsUptakeMapRequest.attributes["inputType"] = inputType.ToLower();
+
+            string itemTaskCode = await _farmmapsApiService.QueueTaskAsync(cropfieldItem.Code, nbsUptakeMapRequest);
+            
+            await PollTask(TimeSpan.FromSeconds(5), async (tokenSource) =>
+            {
+                var itemTaskStatus = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, itemTaskCode);
+                if (itemTaskStatus.IsFinished)
+                    tokenSource.Cancel();
+            });
+            
+            var itemTask = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, itemTaskCode);
+            if(itemTask.State == ItemTaskState.Error)
+            {
+                _logger.LogError($"Something went wrong with task execution: {itemTask.Message}");
+                return null;
+            }
+
+            var itemName = "VRANbs uptake";
+            var uptakeMapItem = await _generalService.FindChildItemAsync(cropfieldItem.Code,
+                GEOTIFF_PROCESSED_ITEMTYPE, itemName, 
+                i => i.Updated >= itemTask.Finished.GetValueOrDefault(DateTime.UtcNow) &&
+                     i.Name.ToLower().Contains(itemName.ToLower()));
+            if (uptakeMapItem == null)
+            {
+                _logger.LogError("Could not find the uptake geotiff child item under cropfield");
+                return null;
+            }
+
+            return uptakeMapItem;
+        }
+
+
+        /// <summary>
+        /// Creates the nitrogen appliance map based on given input data
+        /// </summary>
+        /// <param name="cropfieldItem">The cropfield to base the calculations on</param>
+        /// <param name="inputItem">The farmmaps item containing the geotiff data</param>
+        /// <param name="plantingDate">The date the crop is planted</param>
+        /// <param name="measurementDate">The date the measurements are taken</param>
+        /// <param name="inputType">The inputtype to use</param>
+        /// <param name="targetN">The target nitrogen to use for the calculations</param>
+        /// <returns></returns>
+        public async Task<Item> CalculateApplicationMap(Item cropfieldItem, Item inputItem, DateTime plantingDate, 
+            DateTime measurementDate, string inputType = "irmi", double targetN = 60.0)
+        {
+            var nbsApplianceMapRequest = new TaskRequest {TaskType = VRANBS_TASK};
+            nbsApplianceMapRequest.attributes["operation"] = "application";
+            nbsApplianceMapRequest.attributes["inputCode"] = inputItem.Code;
+            nbsApplianceMapRequest.attributes["plantingDate"] = plantingDate.ToString();
+            nbsApplianceMapRequest.attributes["measurementDate"] = measurementDate.ToString();
+            nbsApplianceMapRequest.attributes["inputCode"] = inputItem.Code;
+            nbsApplianceMapRequest.attributes["inputType"] = inputType.ToLower();
+            nbsApplianceMapRequest.attributes["targetN"] = targetN.ToString(CultureInfo.InvariantCulture);
+            
+            string itemTaskCode = await _farmmapsApiService.QueueTaskAsync(cropfieldItem.Code, nbsApplianceMapRequest);
+            
+            await PollTask(TimeSpan.FromSeconds(5), async (tokenSource) =>
+            {
+                var itemTaskStatus = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, itemTaskCode);
+                if (itemTaskStatus.IsFinished)
+                    tokenSource.Cancel();
+            });
+            
+            var itemTask = await _farmmapsApiService.GetTaskStatusAsync(cropfieldItem.Code, itemTaskCode);
+            if(itemTask.State == ItemTaskState.Error)
+            {
+                _logger.LogError($"Something went wrong with task execution: {itemTask.Message}");
+                return null;
+            }
+
+            var itemName = $"VRANbs application";
+            var applianceMapItem = await _generalService.FindChildItemAsync(cropfieldItem.Code,
+                GEOTIFF_PROCESSED_ITEMTYPE, itemName, 
+                i => i.Updated >= itemTask.Finished.GetValueOrDefault(DateTime.UtcNow) &&
+                     i.Name.ToLower().Contains(itemName.ToLower()));
+            if (applianceMapItem == null)
+            {
+                _logger.LogError("Could not find the application map geotiff child item under cropfield");
+                return null;
+            }
+
+            return applianceMapItem;
+        }
+    }
+}

FarmmapsNbs/Program.cs

@@ -0,0 +1,23 @@
+using System.Threading.Tasks;
+using FarmmapsApi;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+
+namespace FarmmapsApiSamples
+{
+    class Program : FarmmapsProgram<NbsApplication>
+    {
+        private static async Task Main(string[] args)
+        {
+            await new Program().Start(args);
+        }
+
+        protected override void Configure(IServiceCollection serviceCollection)
+        {
+            serviceCollection.AddLogging(opts => opts
+                    .AddConsole()
+                    .AddFilter("System.Net.Http", LogLevel.Warning))
+                .AddTransient<NitrogenService>();
+        }
+    }
+}

FarmmapsNbs/appsettings.json

@@ -0,0 +1,10 @@
+{
+  "Authority": "https://accounts.farmmaps.awtest.nl/",
+  "Endpoint": "https://farmmaps.awtest.nl/",
+  "BasePath": "api/v1",
+  "DiscoveryEndpointUrl": "https://accounts.farmmaps.awtest.nl/.well-known/openid-configuration",
+  "RedirectUri": "http://example.nl/api",
+  "ClientId": "",
+  "ClientSecret": "",
+  "Scopes": ["api"]
+}