What are the size limits for adding fields? What file formats can I upload?

Some Atfarm features have a technical limit on field size. Please bear this in mind when adding your fields to Atfarm.

 

 

Maximum field size

 

When you draw or upload a field, the maximum field size is

 

5.79 ac

 

If you're uploading field boundaries and there are several fields in a file, the total number of acres can of course exceed this number. However, a single field can't exceed 5.79 ac.

 

By limiting the field size, we can guarantee high resolution Variable N-Rate Application (VRA) Maps. A Variable N-Rate Application (VRA) Map shows application pixels as squares or dots representing the center of a 20 x 20 m square (spatial resolution of the pixels from the satellite data). This design allows you to still see the biomass of your field through the pixels.

 

The scaling of the squares depends on the size of the field. The larger the field, the larger the scale (20 x 20 m, 40 x 40 m, 60 x 60 m, 80 x 80 m, etc.). The larger the scaling, the lower the spatial resolution of the pixels from the satellite data. Therefore, we limit the field size to 5.79 ac to ensure an accurate Variable N-Rate Application (VRA) Map.

 

 

Maximum file size and file formats

 

When you upload a file with your field boundaries, the maximum file size is

 

6 MB

 

You can upload a single field boundary in one file, or multiple field boundaries in one file using the file formats below. You can select and upload one file per upload process.

 

Type

Description

Must include

Could include

ZIP Shapefile

A ZIP archive file can be a Shapefile, which must contain 4 file types to be uploaded correctly.

 

A Shapefile can contain 0, 1 or more field boundaries. Atfarm will notify you if the file contains 0 boundaries.

SHP

SHX

DBF

PRJ

SBX, FBN, AIN, AIH, IXS, MXS, ATX, XML, CPG, QIX

ZIP archive file

A ZIP file can be an archive file containing multiple field boundary data file types.

 

Each of these file formats can contain 1 or more field boundaries.

KML

SAM XML

GML

KMZ

 

Single file uploads

Each of these file formats can contain 1 or more field boundaries.

KML

SAM XML

GML

KMZ

 

 

 

Minimum field size

 

 

Crop satellite monitoring

 

You can check the biomass status of your field with recent satellite images and biomass layers in Atfarm if the field is at least

 

0.025 ac

 

Smaller field sizes aren't supported by the satellite data provider.

 

 

Variable N-Rate Application (VRA)

 

We use satellite imagery to calculate a vegetation index for creating Variable N-Rate Application (VRA) Maps in Atfarm. To get accurate results, it's important that your field is at least

 

2.47 ac with a minimum field width and length of 164 ft

 

This size is the technical requirement of our boundary handling algorithm based on the Yara N-Sensor technology. The algorithm overcomes the challenge of mixed information at field boundaries, where satellite pixels may contain data from adjacent structures such as roads, grass paths, waterways or trees. As these pixels are excluded from the calculations, the algorithm replaces their data with the average of neighboring pixels that are completely within the field. This process ensures accurate and reliable information for effective precision fertilization.

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