Cleaned survey data is imported into NaviModel for processing from the EIVA NaviEdit survey data editing software (SQL database or exported), ASCII XYZ, run-line and profiles or raw NaviScan or NaviPac survey files.  Data is internally handled in a quad tree which guarantees fast data access independent of data volume.

The data displays comprise 2D and 3D color-coded views and provide capabilities like appliance of sun il-luminated for shadow casting for fast QC. The software utilizes multiple levels-of-detail for presen-tation; so areas close to the viewpoint are more detailed than areas far away. This method gives the best and the fastest presentation independent of data volume and the amount of RAM available.

Models of a survey area are created by defining the model parameters, the desired cell type and the size and type of acquisition data (minimum, maximum, average, last value, standard deviation and density).

During the model definition phase NaviModel provides facilities for data reduction by setting tolerances for depth variations and allowable shrinkage of model borders.

NaviModel features additional cleaning of models either manually profile by profile in true 3D or automatically utilizing a mathematical model allowing handling of data overlap. Large model data sets can be divided into more files for easier data handling.

The software also provides capabilities for generation of derived models, substitution of one model for another model (e.g. insertion of a theoretical model in a data model), merging of models, etc. NaviModel furthermore comprises features for analysis of actual versus theoretical models, model manipulations and volume/area compu-tations, etc.

Access to progress information and reporting is available at any time during the generation of models