Export and import in Pixpro
Export options in Pixpro¶
Many generated layers and drawn graphical objects can be exported from Pixpro to use in other softwares.
Dense Point Cloud export¶
Dense point cloud can be exported be pressing right mouse button on the Dense Point cloud layer and choosing Export point cloud ...
Firstly an export location and format are chosen. .las .laz. ply .xyz .obj and .dm formats are available for export. After choosing the location and format export parameters window will appear.
In the top part the point cloud name, points count and the chosen export location is visible.
In the options section a few options can be selected:
Project Projection - current project coordinate system projection information is displayed.
Export to Projection - dropdown selection menu for which coordinate system should be used for export. NOTE: one can choose Local Coordinates option from the dropdown menu. This will reduces the coordinate values and effectively drops the referencing information. The end result is similar to having applied the shift option - absolute point cloud position will be discarded, overall scale will remain accurate.
Downsampling - either all or custom. All points mean all points will be exported without downsampling. Custom means that downsampling parameters entered below will affect the total point count of the exported cloud and the overall density of the point cloud can be lowered. These options are useful when other softwares might not handle large amounts of points smoothly or the large amount is not needed.
a. Sampling by Points Count - choose either exact point count or percentage. Note: exported value may not be exactly to the point as chosen.
b. Sampling by Ground Sample Distance - enter value in selected measurement units representing the GSD resolution.
In the Shift section, dense point cloud coordinate shift options can be selected. Shift is useful when absolute dense cloud (and mesh) position is not important but coordinate values must be reduced for certain softwares to import the point cloud smoothly. Overall scale and relative position of points in the dense point cloud will remain accurate.
No shift - point cloud will not be shifted.
Shift to Center - 0 0 0 coordinate point will become the center of the exported point cloud.
Shift to Minimum point - 0 0 0 coordinate point will become the bottom left corner of the exported point cloud.
Custom - user can enter offset values below and these values will be used to shift the dense point cloud coordinates accordingly.
Section below is dependent on which export format is chosen.
LAS and LAZ File Format Options - 16 ir 8 bit color depth can be chosen.
PLY File Format Options - binary or ASCII data format can be chosen.
XYZ File Format Options - XYZ or YXZ coordinate format can be chosen.
DM File Format Options - either 32 or 64 bit precision can be chosen.
OBJ File Format has no specific options.
Dense point cloud made with the bounding box workflow can also be exported with the same settings.
After choosing all the options press Export button below to export the point cloud.
Mesh can be exported be pressing right mouse button on the Mesh layer and choosing Export Mesh ...
In the Export Mesh windows mesh parameters can be seen. Mesh name, vertice count, face count and current location and name selection.
In the options section current project projection is displayed and export projection can be chosen. By default the current projection will be selected.
In the shift section coordinate shift can be chosen and applied. Coordinate shift works in the exact same manner as described above in the dense point cloud export section.
If a texture has been created in the project it will be available for export in the Texture section.
File format options depend on what file format has been chose for export:
OBJ file format option - Precision. Here one can select how many digits there will be in the coordinate information embedded into the OBJ file.
PLY file format options - Precision and data format can be selected. Data format - ASCII or Binary, precision either double or single
DM file format options - no specific options for this format.
Digital Elevation Map export¶
Digital elevation map can be exported be pressing right mouse button on the Digital elevation map layer and choosing Export Digital Elevation Map ...
Digital elevation maps can be exported in .tif Geotif file formats as a raster image or as .obj 3D mesh format. Coordinate projection can be selected. When exporting the .obj format maximum mesh triangle amount can be selected if decimation is needed.
Orthophoto image can be exported by pressing right mouse button on any generated Orthophoto layer. .tif Geotif format is used for Orthophoto export. When exporting Orthophoto imagery any coordinate projection system can be chosen.
Contour line export¶
Contour lines can be exported be pressing right mouse button on the Contour lines layer and choosing Export Contour Lines ...
Contour lines can be exported in .shp or .dxf file formats. Coordinate system can be chosen when exporting Contour lines. When exporting a Single contour line, DEM which the Single contour line is based on can be chosen during the export.
Generated Breaklines can be exported to .shp and .dm file formats with coordinate system selection.
Drawn objects can be exported as a bundle or separately. All objects can be exported by pressing the right mouse button on Objects category layer and by choosing Export Objects .... The same workflow can be done for all objects classes and separate objects.
Points can be exported to: 1. .shp, .dxf, .las, .laz, . ply, .pxg, .dm formats with coordinate system selection. 2. .kml, .kmz formats in WGS84 coordinate system.
Lines can be exported to: 1. .shp, .dxf, .pxg, .dm formats with coordinate system selection. 2. .kml, .kmz formats in WGS84 coordinate system.
Polygons can be exported to: 1. .shp, .dxf, .pxg, .dm formats with coordinate system selection. 2. .kml, .kmz formats in WGS84 coordinate system.
Additionally, lines and polygons can be exported as points using the "Export Lines/Polygons As Points" context menu item. This will create a .shp file which will contain points extracted from line and polygon vertices.
Exporting the 3D view¶
3D window contents can be printed or exported as a file. To print the 3D view window press
Select the available printer for a physical print or Microsoft to pdf to create a pdf file. Choose where to save the pdf file.
Import options in Pixpro¶
A number of layers can be imported into Pixpro from other projects or sources.
Point Cloud import¶
Point clouds can be imported by pressing right mouse button on Point Clouds layer group in the layers panel and selecting Import Point Cloud .... .las .laz. ply .xyz point clouds can be imported. When importing the correct coordinate system of the point clouds must be selected. Imported point clouds can be measured and used to generate a Digital elevation maps for measurements, but meshes cannot be created. Imported point clouds cannot be regeoreferenced as well.
Meshes can be imported by pressing right mouse button on Meshes layer group in the layers panel and selecting Import Mesh ... Meshes can be imported as .obj and .ply files. However not all meshes will be displayed correctly when imported into PixPro.
Best way to ensure that mesh is imported correctly into the PixPro software is to make sure that the coordinate systems and referencing is selected identically during the export and import process. This also includes coordinate shift options and local coordinate systems.
When importing a mesh from another PixPro project, just select identical options that were selected during the export. This will result in proper import result - correct mesh placement, orientation and scale if both projects are the same or similar enough.
When importing a mesh from en entirely different software, referencing settings should be matched to the current PixPro project settings, as closely as possible. Coordinate shift can not be selected or performed during the mesh import. This means that only precisely matched meshes can be imported from third party sources.
Digital Elevation map import¶
Digital Elevation maps can be imported by pressing right mouse button on Digital Elevation maps layer group in the layers panel and selecting Digital Elevation map ....
Digital Elevation maps can be imported as GeoTif .tif raster files. Most important factor during the DEM import is to select the correct coordinate system of the imported layer.
Orthophotos can be imported by pressing right mouse button on Orthophotos layer group in the layers panel and selecting Import Orthophoto ...
Orthophoto can be imported as .tiff raster files. Most important factor during the Orthophoto import is to select the correct coordinate system of the imported layer. after selecting the coordinate system, the user is prompted to choose a DEM to which the orthophoto will be connected to.
Orthophoto cannot be displayed in the 3D view without a corresponding DEM.
Flight track import¶
A flight track can be imported by pressing right mouse button on Flight tracks layer group in the layers panel and selecting Import Flight track ...
Flight tracks can be imported as .txt .csv .pxg files text files. During the flight track import a window similar to that of GCP import.
Here appropriate columns for Latitude, Longtitude, Altitude and other options can be selected.
During the flight track import the approach of how images are identified must be selected. Images can be identified in two different ways, either by name or by time. This will be dependent on the flight track file that is being imported. Flight track may also contain camera orientation information expressed in Yaw, Pitch and Roll values.
Objects can be imported by pressing right mouse button on Objects layer group in the layers panel and selecting Import Objects ... or by doing the same for each object class (point, line, polygon).
Objects can be imported:
- as .shp, .pxg or .ply files. Correct coordinate system selection is important when importing objects in these formats. Aplicable for Points, Lines and Polygons.
- as .kml or .kmz files. These files will always use WGS 84 coordinate system.
- as .las or .laz files. Aplicable for Points. Correct coordinate system selection is important when importing points in these formats.