Field Management Zones

The FMZ function allows the comparison of different crop performing for one parcel. It derives Field Management Zones for a defined observation period (season). The (maximum) NDVI (value per pixel from each measurement during the given period) is used to estimate zones within a field which perform better (zones with relatively larger values than the average) or worse (zones with relatively lower values than the average). The zones are classified in categorical values as following:

• 1 (25% less crop performance or more)
• 2 (10-25% less crop performance)
• 3 (0-10% less crop performance)
• 4 (0-10% more crop performance)
• 5 (10% greater crop performance or more)

Response/Output is possible in three different data types: png, json and GeoTIFF

Please see full documentation: https://sites.google.com/site/geocledian/home/product-overview/phenology

Resource associated to parcels 
Resource URL: /parcels/<id>/zones.json

HTTP Request

GET https://geocledian.com/agknow/api/v3/parcels/<parcel-id>/zones.json?key=kkk&radius=sss&startdate=ddd&enddate=eee
GET https://geocledian.com/agknow/api/v3/parcels/<parcel-id>/zones.png?key=kkk&radius=sss&startdate=ddd&enddate=eee
GET https://geocledian.com/agknow/api/v3/parcels/<parcel-id>/zones.tif?key=kkk&radius=sss&startdate=ddd&enddate=eee

Path Parameters

parcel-id	id of parcel
product_name	valid value: „zones.json“, „zones.png“, „zones.tif“

Required parameters

key	registered user key to authorize user default: „“
startdate	beginning of the observation period, date: YYYYMMdd, e.g. 20181010
enddate	end of the observation period, date: YYYYMMdd, e.g. 20190401

Optional parameters

epsg	The IOGP’s EPSG Geodetic Parameter Dataset is a collection of definitions of coordinate reference systems and coordinate transformations which are global, regional, national or local in application, e.g. 32633

Example

GET https://geocledian.com/agknow/api/v3/parcels/<parcel-id>/zones.json?key=kkk&startdate=20180301&enddate=20180901&epsg=32633

Response

{

    „type“: „FeatureCollection“,
    „features“: [
        {
            „geometry“: {
                „type“: „MultiPolygon“,
                „coordinates“: [
                    [
                        [
                            [
                                847960.607337658,
                                6326537.46297389
                            ],
                            [
                                847960.607337658,
                                6326547.46297389
                            ],
                            [
                                847970.607337658,
                                6326547.46297389
                            ],
                            [
                                847970.607337658,
                                6326537.46297389
                            ],
                            [
                                847960.607337658,
                                6326537.46297389
                            ]
                        ]
                    ],
    „type“: „Feature“,
    „properties“: {

            „val“: 2
}

Example

GET https://geocledian.com/agknow/api/v3/parcels/<parcel-id>/zones.png?key=kkk&startdate=20180301&enddate=20180901&epsg=32633

Response

PNG file

Example

GET https://geocledian.com/agknow/api/v3/parcels/<parcel-id>/zones.tif?key=kkk&startdate=20180301&enddate=20180901&epsg=32633

Response

GeoTIFF file

Remarks

• Cellsize of the output is 10m.
• zones derivation only meaningful during the respective crop growth season (defined through startdate and enddate)
• therefore: prior knowledge of crop calendars and crop seasons may be necessary