This study has explored and presented a GIS software solution for creating spatial data collection forms to be used in field surveys and to support humanitarian demining processes. It has been revealed that most existing solutions have not considered the specific requirements for registering complex spatial features in the field of mine action. The study has applied set theory to formalize the technical solutions required by data collection operators to simplify the registration of such features in the surveyed areas of suspected or confirmed hazards. An improved approach based on the Flet framework has been proposed, which facilitates cross-platform development of mobile applications, provides integration with GNSS receivers, and automates data entry. A model of the geospatial structures registration process in the mobile application interface has been built. The concept of the Spatial Features Form as GIS application graphical interface has been developed, which optimizes the process of collecting geospatial data. The comparative analysis has shown the advantages of the application over Survey123 due to the simplified registration of geospatial structures. The obtained results can be used to improve spatial data collecting and processing methods in humanitarian demining and other areas that require accurate mapping of hazard areas.