Surveying & Mapping Services: Terrestrial, Drone Aerial Photography, and LiDAR
Need field data and its processing in one go? We coordinate surveys with our field partners, then process the data ourselves into maps, 3D models, analysis, or a WebGIS — you deal with a single point of contact.
One Point of Contact from Field to System
Many geospatial projects stall at the hand-offs: the survey team delivers data, then the processing team finds the coordinate system unclear, too few control points, or a format that does not suit the system. We close that gap. Field surveys are carried out with survey partners we work with regularly, while planning, quality control, and all data processing stay with us — so the data collected from day one already fits the end product you need.
Survey Types
Terrestrial surveys. GNSS (RTK and static) and total station measurements for site and topographic maps, contours, control points, staking out, and detailed surveys of buildings and infrastructure.
Drone (UAV) aerial photography. Aerial imaging with ground control points (GCP) and independent check points (ICP) to produce centimetre-resolution orthophotos, surface models (DSM), terrain models (DTM), and contours — suited to estates, plantations, mines, and road corridors.
LiDAR & 3D scanning. For densely vegetated areas or detailed 3D needs, LiDAR scanning produces point clouds that can be processed into DTMs, building models, and Digital Twin assets.
Remote sensing. When an area is too large to survey directly, field data is combined with satellite imagery — fieldwork is then only needed at sample points.
Quality Control
Every job starts with a plan: the coordinate system and datum, the target accuracy, the distribution of control points, and the delivery format. Results are tested against independent check points and their accuracy is reported, so you know which map scale they support. Flight permits and field safety follow applicable regulations and are handled together with the executing partner.
Where We Work
We are based in Semarang, Central Java. Work outside Central Java is served together with partners in the nearest region; mobilisation costs are stated openly in the quotation.
What You Receive
- Survey data and an accuracy report (control point coordinates, RMSE against check points).
- Orthophotos, DSM/DTM, contours, and site/topographic maps in GIS and CAD formats.
- Point clouds and 3D models when LiDAR or photogrammetry is used.
- Optional follow-ups: spatial analysis, volume calculations, or a WebGIS to publish the results.
Frequently Asked Questions
Does Geo Anfa Spasial carry out the surveys itself?
Fieldwork is carried out with survey partners we work with regularly, matched to the survey type and location. Planning, quality control, and all data processing stay with us, and you deal with a single party from start to delivery.
When should we choose drone over terrestrial survey?
Drones are efficient for large open areas and deliver an orthophoto plus a surface model at once. Terrestrial surveys suit hidden details, high accuracy at specific points, or small sites. Many jobs combine both: control points measured terrestrially, the area photographed by drone.
How accurate are the resulting maps?
Accuracy is set during planning to match the map scale you need, then proven by testing against independent check points. The RMSE figures are reported with the results, so you know which scale the map supports.
Do you serve locations outside Central Java?
Yes, together with partners in the nearest region. Mobilisation costs are itemised openly in the quotation, so no extra costs appear mid-project.
Can survey results go straight into a WebGIS or Digital Twin?
Yes — that is the advantage of one point of contact. Because we know the system requirements from survey planning onward, field data is processed straight into the formats a WebGIS, geoportal, or Digital Twin needs, with no re-conversion.
