I'm new to OpenTripPlanner project. Trying to understand how the travel options are working like walk, bicycle and other options. When we are choosing Bicycle only,
we have an Triangle option where the end user can specify the parameters like whether it is Quick or Bicycle friendly or Slop option. Based on these parameters
i can see two different paths for the same source and destination. Please help me how it works?
Related
I created a custom circle layer. I want to show this layer only on water and not on land. I managed to do the opposite (ie: showing the layer on land and not on water) using below command. Refer this image for better understanding
map.moveLayer('polygon','water');
Now I need to know the land layer which is used by mapboxgl so that I can call function map.moveLayer('polygon','land'); to achieve what i want.
I need help to find the different layers present in the mapboxgl-streets map. But unfortunately, Mapboxgl doesn't have map.eachLayer function.
You can use the Map#getStyle method to get a serialized representation of the entire style including the layers.
map.getStyle().layers
It depends on the map style you're using. In general, you either have to look at its source or load it in Mapbox Studio to identify the correct layer name. Also keep an eye on https://github.com/mapbox/mapbox-gl-js/issues/4173.
Just to add to Lucas' answer (which is still correct), map.getStyle().layers provides all layers in the style, including ones you have explicitly added (via map.addLayer()), and those that are included in the style (which could be a lot). Careful how you filter through these. For my case, I created arrays to hold the layers I created myself, to make future iteration simpler.
in a Cube, I have a calculated measure [Nb>4] depending on a measure [Nb], filtering only the values above 4.
We don't want users to see the underlying measure [Nb], so I defined a perspective which hides it using -[Measures].[Nb]
I am looking for a way to give access to a perspective without giving access to the cube it depends on... (because using xmla (Excel), users can currently see the perspective and the cube).
I tried to do that using the roles definition module, but it seems not to be possible.
You can define the 'default' perspective (see first image). This perspective is a special one that applies visibility to all cube.
It should be possible then to hide your measure
-[Measures].[Nb]
I am using this example from a Computer Vision Made Easy" Matlab Webinar I watched, since I intend to use Computer Vision for my research in order to count cars and/or other types of vehicles.
Although I have changed some of the filter parameters and the detection works quite well, the problem is that the script displays ALL moving objects in the video. I would like to count vehicles from a specific road but my video screenshot includes many roads (screenshot here).
1) Is there a way to set the area of the video that I would like to detect cars? For example, only the "green arrow" road, and leave out the rest? I tried to crop the video but it is not a good solution since a part of another road always appears(screenshot here).
2) Moreover, in which part of the code can I add a counter in order to have an output on how many vehicles passed through the specific segment of the road? Any ideas on that?
If you know ahead of time where the road is, you can create a binary mask image, where the road is marked with 1's, and everything else has the value of 0. Then you can simply check whether or not a moving object is inside your region of interest.
Once you get comfortable with this example, check out a more advanced version, which not only detects moving objects, but also tracks them using the Kalman filter.
I am going to design an Android application and I will be needing the distances of the pathways inside our university(pathways between buildings)
I read about OSM(OpenStreetMap) and tried it. It is a map which is editable which means anyone can contribute to that map(like a wikipedia map version).
It has many routing services that give routes and directions between two point(start and end).
There is a routing service named GraphHopper and it is very easy to use. I can just drag and drop the start and end pt and it gives the distance(km) between the two pts.
What I want to know is how did they come up with the distance?
Is the distance reliable and accurate?
Any help is greatly appreciated because I want to use the distances for my Android app and I need to know if these distances have basis.
The distance is 'accurate' in the sense that it correctly processes the existing information from OpenStreetMap and correctly adds road segments for the final route. You can just try for your local area and compare to your own knowledge.
There could be mapping errors, where a road is incorrectly mapped. And there could be also roads missing and so the router uses a detour making the path unnecessarily longer. Also there are different modes like for cars or bikes or fastest and shortest where you get a different distance between two coordinates.
Can someone please explain to me how coordinate transformations work in draw2d?
I have a hierarchical diagram where a figure can contain figures which also contain figures. At first I added internal figures by using the request's getLocation, fetching the host figure of the EditPolicy and appliying hostFigure.translateToRelative(location) but does not work! neither combinations of translateToParent and other things.
At the end I copied the implementation from the Logic example, which uses getConstraintFor, a method provided by the policy which does the translation itself. I checked this could but also could not understand how it works.
I read in a number of threads in the eclipse forums on this subject, but still don't understand why a simple method like translateToAbsolute does not behave as expected. Could anyone please explan? Thanks
Two pieces of information that might shed some light on your problem:
Depending on the request type I would expect the location to already be in absolute coordinates.
Unless explicitly implemented otherwise, Figures don't have a local coordinate system for their children. So converting a location up and down the Figure hierarchy does not necessarily change the coordinates.