On mobile devices, you can zoom in and out at will. Zooming in is appreciated by the map makers as it allows more precise drawing and sketching and more accurate display of the background map.
However, by zooming in and out, map makers are not working at a fixed scale and so the sense of distance within the map is lost. This was easier when mapping with pen and paper where the scale was fixed.
A few things can be done to improve the feeling for the scale on a mobile device:
Working with the OCAD Sketch App
Make use of the scale bar that has been added in the latest update of the app. The scale bar can be turned on or off in the settings.
Adjust the distance between the north lines. You can do so in the settings. E.g., set it to 1mm in a project with a 1:10’000. This gives you every 10 meters a line. In a 1:4’000 project, use 2.5mm to get a line every 10 meters.
Know the different line widths. It is advantageous to know the line widths and to sketch objects accordingly. E.g., an impassable wall on a sprint map with a line width of 0.4mm and contour lines with a line width of 0.21mm.
The previous version of the Route Analyzer is limited to 2D sprint maps, because it assumes a constant speed and only distinguishes between passable and impassable map objects. The shortest route is displayed as the result.
Consideration of runnability and relief
To find the fastest route, the Route Analyzer takes into account the distance, the relief and the runnability.
Therefore, resistance values are assigned to the individual map symbols. These are based on assumptions and can be changed in the settings. It is well known that the forest is not equally runnable depending on region and season.
The influence of the relief must be divided into two factors: The difference in altitude in the running direction and the slope transverse to the running direction. The latter causes a reduced speed when running along a steep slope.
Taking these influencing factors into account, the algorithm calculates the fastest route from one control to the next. Alternative routes can be added with via points, which are mandatory to pass. In OCAD, the distance, climbing and expected running time are displayed for each route.
Up-to-date map symbols and elevation model required
A prerequisite for correct functioning with the new calculation method is a map with a current set of symbols and a digital elevation model (DEM). When assigning the resistance values, OCAD accesses the map symbols. If their properties (symbol number, color values, line thickness, etc.) are within a range defined by OCAD, an assignment is made. An up-to-date symbol set that complies with the specifications of the International Orienteering Federation is therefore advantageous.
The DEM is normally created by the map maker to calculate e.g. contour lines or a hill shading map. Newly, the DEM can be more easily passed on to the course setters as an optimized and compressed Course Setting DEM (ocdCsDem) due to the greatly reduced file size, or even directly embedded into the map file or course setting file.
Many application possibilities
Thanks to the relative time difference between route variants, the Route Analyzer 2.0 can be used as an aid for planning exciting route choices in all orienteering disciplines. In addition, it can be used to calculate distance, amount of climbing and expected running time along the ideal route of an entire orienteering course at the push of a button. Besides, the Route Analyzer 2.0 can also point out undesirable or dangerous routes, e.g. due to missing restricted areas or unclearly drawn maps.
Whether the displayed route is actually the fastest route depends on individual factors such as personal strengths, in addition to those already mentioned such as region and time of year. With the help of GPS routes, the fastest route can be determined in retrospect or at least guessed. Nevertheless, it is exciting to compare the personally favored routes with the calculated results.
At OCAD, we not only develop and maintain the OCAD software, but we are all active cartographers, course setters, and map controllers. Almost all of us.
Gian-Reto Schaad is a very experienced cartographer and member of the Swiss Orienteering Map Commission, who completes every year several smaller and large mapping projects using his Windows tablet. Furthermore, he is responsible for the layout and print preparation of all maps for the Swiss O Week 2023.
Hubert Klauser, also a member of the Swiss Orienteering Map Commission, is doing several maps each year, such as the very demanding Kernwald earlier this year. Developing the OCAD Sketch App and at the same time test it extensively in the field went hand in hand.
Andreas Kyburz has also recently been involved in major mapping project, where he felt in love with the OCAD Sketch App. The former member of the Swiss National Orienteering Team also likes to set challenging courses for training and competitions. The OCAD Route Analyzer helps him with this.
Thomas Gloor concentrated mainly on being map chief and map consultant for the region of Northwestern Switzerland after a long period of activity for both the IOF and the Swiss Map Commission.
Alstair Landels is our new employee at OCAD since June this year. As a former World Cup winner (1994) he knows how to set interesting courses for orienteering races. With Alistair, the OCAD team becomes more international. Born in New Zealand, Alistair lives and works in England.
Rahel Lozano is our accountant and has nothing to do with cartography and orienteering. She makes sure that the orienteering freak show doesn’t get too out of hand by talking about normal life.
What is the best way to manage these sketches? How do I make sure that I draw all sketches?
Manage Sketch Features All sketches are listed in the menu Sketch > Manage Sketch Features. When a sketch is selected in the list, the OCAD drawing area is centered on it.
Show Sketches Under Menu Sketch > Options there are different display options that make sense depending on the situation. We recommend testing different transparency and opacity settings, e.g. if sketch features should be behind map objects or not.
Opacity: An sketch feature opacity of 100% will cover the map objects behind it.
Transparent: If the rendering of the sketch features is slow, the transparency should be turned off.
Display sketch layer behind map: We recommend to activate this option during the final drawing. For mapping in the terrain with a Windows tablet and OCAD Desktop, it’s better to have the sketches before the map. In the OCAD Sketch App, the Sketch layer is always before the map.
Hide sketch features: All sketches can be hidden in the toolbar or under menu Sketch > Hide. Advanced users can also use a Shortcut.
Delete Sketches The following options are available for deleting sketches.
Eraser The eraser in the sketch toolbar can be used to erase sketch features completely or partially. In contrast to custom OCAD map objects no preliminary feature selection is needed for this. Depending on the zoom level, sketch features can be erased with varying degrees of coarseness. Zoom out to quickly delete features over a large area.
Visual Inspection At the end of the final map work, the question arises: Have I worked through all my sketches? In case the sketches were deleted or erased during the final map work, you can check the list under Sketch > Manage Sketch Features.
If the sketches were not deleted during the final map work, a visual check is necessary. To make the sketches clearly visible, the map and background maps can be displayed transparently or not at all.
Switch to Draft mode and use the slider in the View toolbar to set the opacity of the map (M) and background map (B) to the far left.
Alternatively, you can hide the map and the background map (menu Map > Hide; menu Background Map > Hide All).