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Lab Overview
This lab focused on using ArcGIS Online and ESRI Field Maps to plan and document Ground Control Point placement for a UAS mapping mission. The main goal was to create data layers ahead of time so GCP placement in the field would be organized, evenly distributed, and easy to record. By planning the mission area and GCP locations before arriving on site, the lab emphasized efficiency and improved data quality during UAS operations.
The lab also introduced how mobile GIS tools can be used for field notes, photo documentation, and location tracking during mapping missions.
Creating Mission Planning Layers
The first part of the lab involved working in ArcGIS Online to create feature layers that would later be used in the field. A folder was created to store all lab-related layers, keeping content organized. Two main features were created: a polygon layer representing the mission area and a point layer representing planned GCP locations.
An online map was then created using an imagery basemap. The mission area polygon was drawn to match the Turf Farm mapping area used in previous labs. Once the mission boundary was complete, ten GCP points were added and evenly distributed throughout the area to avoid clustering or placement along the edges.
Online Map Setup
After creating the feature layers, they were added to a single online map. This map served as the main mission planning tool that could be opened later in the field using ESRI Field Maps. Using an imagery basemap helped with visual orientation and made it easier to match real-world features when placing GCPs.
The map was saved and named clearly to indicate it was being used for mission planning. This step reinforced the importance of having all mission planning data accessible in one place before arriving at the site.
Creating the GCP Field Notes Layer
A second GCP point layer was created using an ArcGIS template designed for ground control points. This layer was specifically intended for field notes and actual GCP placement. The lab required editing the attribute fields to better match field needs.
Custom domains were created for the control point type field, allowing users to select predefined options such as plastic marker, aeropoint, painted, or other. This made data entry in the field faster and more consistent.
Field Maps and Data Collection
Once the map and layers were configured, the map was accessed using the ESRI Field Maps mobile app. Editing and syncing permissions were carefully set so only the field GCP layer could be edited, while the mission area and planned GCP layers remained locked.
In the field, users could add points, record notes, and attach photos using their phone. The ability to attach images to each GCP provided strong visual documentation and served as useful field notes for later processing.
If weather conditions allowed, the planned GCP locations were visited at the Turf Farm and recorded directly in Field Maps.
Key Takeaway
This lab demonstrated how preplanning GCP placement using ArcGIS Online and ESRI Field Maps improves efficiency and data quality during UAS missions. Creating mission layers ahead of time reduces confusion in the field and ensures GCPs are evenly distributed. Overall, the lab highlighted the value of combining desktop GIS planning with mobile field data collection for professional UAS operations.
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