We have developed the algorithm for calculating border field on the base of field work (for example: seed or yield data). The algorithm checks the field work with the boundary of the field. The report with the results of analyse and assignment for field work has been added. The registry of field equipment and job tasks related to equipment and the service's http://ravenslingshot.com/ have been created. Also we have added layer options: field number, date and type of the layer works.