topic divergence between map and Route plan in Qt Maps SDK Questions

divergence between map and Route plan

MarekFlorianczyk — Sat, 11 Dec 2021 08:49:39 GMT

Hi

I'm working on a navigation app. I have noticed that sometimes there is a divergence between the map and Route plan. Clearly, you can see this in attached pictures, can someone shed some light why this is happening?

My QML code:

RouteTask {
            id: routeTaskOnline
            url: "http://route.arcgis.com/arcgis/rest/services/World/Route/NAServer/Route_World"
            Credential {
                oAuthClientInfo:oAuth
            }

            onLoadStatusChanged: {
                if (loadStatus === Enums.LoadStatusLoaded) {
                    console.log("Route task ready");
                    routeTaskOnline.createDefaultParameters();
                }
            }

            onCreateDefaultParametersStatusChanged: {
                if (createDefaultParametersStatus === Enums.TaskStatusCompleted) {
                    routeParameters = createDefaultParametersResult;
                    routeParameters.returnRoutes = true;
                    routeParameters.returnDirections = true;
                    routeParameters.directionsDistanceUnits=Enums.UnitSystemMetric;
                    routeParameters.directionsLanguage="PL"
                    routeParameters.travelMode.outputGeometryPrecision=1;
                    routeParameters.outputSpatialReference = SpatialReference.createWebMercator();
                }
            }

            onErrorChanged: {
                console.log("Route Error:", JSON.stringify(routeTaskOnline.error));
            }
            onSolveRouteStatusChanged: {
                if (solveRouteStatus === Enums.TaskStatusCompleted && solveRouteResult) {

                    for (var index = 0; index < solveRouteResult.routes.length; index++) {
                        console.log("add route graphics idx:"+index)
                        route = solveRouteResult.routes[index];
                        routeGraph = ArcGISRuntimeEnvironment.createObject("Graphic", {geometry: route.routeGeometry});
                        routeGraph.attributes.insertAttribute("route",1);
                        graphicsOverlay.graphics.append(routeGraph);
                        directionListModel = route.directionManeuvers;
                    }
                }
                else if (solveRouteStatus === Enums.TaskStatusErrored) {
                    console.log("Route error");
                }
            }
            Component.onCompleted: {
                routeTaskOnline.load();
            }
}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Pictures:

Best Regards

Marek

Re: divergence between map and Route plan

Anonymous User — Fri, 04 May 2018 04:03:56 GMT

Looks like the basemap tiles (which I assume are pre-rendered imagery service) has road lines that are different from the network lines in the network dataset. In essence, you are overlaying two different datasets and noticing the differences.

Just because both datasets seem to be hosted by ESRI doesn't guarantee parity.

Re: divergence between map and Route plan

MarekFlorianczyk — Fri, 04 May 2018 07:53:17 GMT

Hi,

Kind of hard for me to accept that answer. No matter what map I use provided by ESRI, like BasemapNavigationVector, there is always the same divergence problem, and I know the roads are mapped correctly, I have checked this driving with gps. What is more ESRI has a support for Polish language, thats why I choose it, it has driving directions in Polish language, so it is unlikely that is has network dataset so wrong.

Ha, and a minute ago I have discovered that when i install my app on Android phone and I select very the same route, route line is drawn correctly.

So what the heck is going on?

Re: divergence between map and Route plan

FrankKish — Sat, 11 Dec 2021 08:49:41 GMT

It looks like the route is being generalized, the world routing service by default has the geometry precision set to 10 meters, but your code explicitly sets this property "routeParameters.travelMode.outputGeometryPrecision=1" so it is unclear as to why the route would be be generalized. I looked at the examples above, even using the default of 10 m the output route does not have the those those large divergences from the base map. I had to set the outputGeometryPrecision to 100 and 200 m to get anything similar.

Not sure where you are doing the initial development but if you can capture the web request to the world routing service it should have the values for the outputGeometryPrecision that is being used (and the outputGeometryPrecisionUnits). That would show what the rest call is actually using for these values.

Re: divergence between map and Route plan

MarekFlorianczyk — Sat, 05 May 2018 11:27:47 GMT

Hi Frank

Thanks for Your attention.

I have attached tcpdump, hope it will help.

Best Regards

Marek

Re: divergence between map and Route plan

FrankKish — Tue, 08 May 2018 16:28:05 GMT

Looking at the tcpdump output the REST call is sending "outputGeometryPrecision = 1000000", this is the reason for the divergence between the map and route. What I'm not sure about how the REST call has this when code has outputGeometryPrecision=1;

You said "when i install my app on Android phone and I select very the same route, route line is drawn correctly.", exact what is your setup\development environment when you get the problem?

Thanks

Re: divergence between map and Route plan

MarekFlorianczyk — Sat, 11 Dec 2021 08:49:44 GMT

My development enviroment is Linux 64Bit with Qt 5.10.1. Debian 9

I have downloaded ArcGIS 100.2.1 and have it installed in:

/opt/arcgis/runtime_sdk/qt100.2.1/
I did not perform integration with Qt Creator I'm only using runtime, so in my .pro file I have:

include(/opt/arcgis/runtime_sdk/qt100.2.1/sdk/ideintegration/arcgis_runtime_qml.pri)_

and in main.cpp there is:
#ifdef Q_OS_LINUX
    engine.addImportPath("/opt/arcgis/runtime_sdk/qt100.2.1/sdk/linux/x64/qml");
#elif defined(Q_OS_ANDROID)
    engine.addImportPath("/opt/arcgis/runtime_sdk/qt100.2.1/sdk/android/armv7/qml/");
#endif

I'm using QML, application has backend written in cpp but regarding ArcGIS all code is in QML.

gcc -v 
Using built-in specs. 
COLLECT_GCC=gcc 
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper 
Target: x86_64-linux-gnu 
Configured with: ../src/configure -v --with-pkgversion='Debian 6.3.0-18+deb9u1' --with-bugurl=file:///usr/share/doc/gcc-6/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc
,obj-c++ --prefix=/usr --program-suffix=-6 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=
posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-obje
ct --disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/us
r/lib/jvm/java-1.5.0-gcj-6-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64 --with-arc
h-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --with-target-system-zlib --enable-objc-gc=auto --enable-multiarch --with-arch-32=i686 --with-abi=m64 --with-multilib-li
st=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu 
Thread model: posix 
gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)

Best Regards
Marek

Re: divergence between map and Route plan

MarekFlorianczyk — Tue, 08 May 2018 17:07:06 GMT

This code:

onCreateDefaultParametersStatusChanged: {

                if (createDefaultParametersStatus === Enums.TaskStatusCompleted) {

                    routeParameters = createDefaultParametersResult;

                    routeParameters.returnRoutes = true;

                    routeParameters.returnDirections = true;

                    routeParameters.directionsDistanceUnits=Enums.UnitSystemMetric;

                    routeParameters.directionsLanguage="PL"

                    routeParameters.travelMode.outputGeometryPrecision=1;

                    routeParameters.outputSpatialReference = SpatialReference.createWebMercator();

                    console.log("onCreateDefaultParametersStatusChanged travelMode:"+JSON.stringify(routeParameters.travelMode))

}_

generates debug output:

qml: onCreateDefaultParametersStatusChanged travelMode:{"objectName":"","objectType":"TravelMode","error":null,"objects":{},"attributeParameterValues":{"0":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Avoid Unpaved Roads","parameterName":"Restriction Usage","parameterValue":5},"1":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Avoid Private Roads","parameterName":"Restriction Usage","parameterValue":2},"2":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Driving an Automobile","parameterName":"Restriction Usage","parameterValue":-1},"3":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Through Traffic Prohibited","parameterName":"Restriction Usage","parameterValue":5},"4":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"TravelTime","parameterName":"Vehicle Maximum Speed (km/h)","parameterValue":0},"5":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Roads Under Construction Prohibited","parameterName":"Restriction Usage","parameterValue":-1},"6":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Avoid Gates","parameterName":"Restriction Usage","parameterValue":2},"7":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Avoid Express Lanes","parameterName":"Restriction Usage","parameterValue":-1},"8":{"objectName":"","objectType":"AttributeParameterValue","error":null,"objects":{},"attributeName":"Avoid Carpool Roads","parameterName":"Restriction Usage","parameterValue":-1}},"description":"Models the movement of cars and other similar small automobiles, such as pickup trucks, and finds solutions that optimize travel time. Travel obeys one-way roads, avoids illegal turns, and follows other rules that are specific to cars. When you specify a start time, dynamic travel speeds based on traffic are used where it is available.","distanceAttributeName":"Kilometers","impedanceAttributeName":"TravelTime","name":"Driving Time","outputGeometryPrecision":1,"restrictionAttributeNames":{"0":"Avoid Unpaved Roads","1":"Avoid Private Roads","2":"Driving an Automobile","3":"Through Traffic Prohibited","4":"Roads Under Construction Prohibited","5":"Avoid Gates","6":"Avoid Express Lanes","7":"Avoid Carpool Roads"},"timeAttributeName":"TravelTime","type":"AUTOMOBILE","uTurnPolicy":3,"useHierarchy":true,"objects":{}}

Best,

Marek

Re: divergence between map and Route plan

LucasDanzinger — Fri, 11 May 2018 14:22:07 GMT

I've tested changing the geometry precision, and changing the precision indeed gives the generalized results like Frank has suggested. I also setup a test app where I change the precision and watch the output http request, and it seems to always reflect what I have set. Can you test to see if when you set the precision if it gets passed through properly in the http request?

Re: divergence between map and Route plan

MarekFlorianczyk — Fri, 11 May 2018 14:51:51 GMT

I'm not sure which part of tcpdump I should search in.

I believe this is what I paste down. I can send you full tcpdump from the moment app starts to the moment when route is solved, but I would rather do that to some email address.

Best,

Marek

16:40:17.500845 IP 192.168.132.254.48546 > ec2-18-232-41-248.compute-1.amazonaws.com.http: Flags [P.], seq 2102:2782, ack 7638, win 366, options [nop,nop,TS val 68938797 ecr 11409024],
length 680: HTTP: POST /arcgis/rest/services/World/Route/NAServer/Route_World/solve HTTP/1.1
E.....@.@.........)....P......[l...n.......
...-....POST /arcgis/rest/services/World/Route/NAServer/Route_World/solve HTTP/1.1
Host: route.arcgis.com
User-Agent: ArcGISRuntime-Qt/100.2.1 (debian 9; x86_64; Qt 5.10.1; QML)
referer: lfLgeiHWVTS60dHm
Content-Type: application/x-www-form-urlencoded
Cookie: AGS_ROLES="imRZGn+N3VG9o32gh+AdSHcql/TTN/F4QCyFHp+naJ0Vh26o1ZiqkzhYGkBTUtk3kn0jHstLs4Kf82O4Juk7HyFdfGmMmqEM53kjJs72Nm5EmH7UKCYknMfCRD2Y8F2u4CJFbUBNq/kXwVLeA91OI5GG/UC9jz404XNft4
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Content-Length: 3283
Connection: Keep-Alive
Accept-Encoding: gzip, deflate
Accept-Language: pl-PL,en,*

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ength 1440: HTTP
E.....@.@.........)....P......[l...n.......
...-....f=json&accumulateAttributeNames=Miles%2CKilometers%2CTravelTime&attributeParameterValues=%5B%7B%22attributeName%22%3A%22Avoid Unpaved Roads%22%2C%22parameterName%22%3A%22Restric
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16:40:17.501186 IP 192.168.132.254.48546 > ec2-18-232-41-248.compute-1.amazonaws.com.http: Flags [.], seq 4222:5662, ack 7638, win 366, options [nop,nop,TS val 68938797 ecr 11409024], l
ength 1440: HTTP
E.....@.@.........)....P...G..[l...n.......
...-....cations=true&impedanceAttributeName=TravelTime&outSR=%7B%22wkid%22%3A102100%2C%22latestWkid%22%3A3857%7D&outputGeometryPrecision=10%2C000000&outputGeometryPrecisionUnits=esriMet
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16:40:17.661726 IP 192.168.132.254.48546 > ec2-18-232-41-248.compute-1.amazonaws.com.http: Flags [P.], seq 5662:6065, ack 7638, win 366, options [nop,nop,TS val 68938838 ecr 11410247],
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Re: divergence between map and Route plan

LucasDanzinger — Wed, 23 May 2018 14:46:29 GMT

Can you please contact Esri Support with your repro app? I think they will be able to help troubleshoot different scenarios further and hopefully come to a resolution. One thing I am suspicious of is if there is some issue with separator , vs . as those differ between U.S. and Polish/other locales on the various operating systems. Somehow your geometry precision is going from 1 to 1000000, and that is the cause of the generalized lines - I am just not sure how the number is changing.

Re: divergence between map and Route plan

MarekFlorianczyk — Wed, 23 May 2018 16:04:30 GMT

Yes I had an issue with this separator myself, functions needs to be Locale Aware.

On the other hand I have switched default application locale to en_EN - didn't help.

What Esri Support do you have in mind ? Support in my country ?

Not good only for ArcGIS desktop applications.

This issue is not critical for me, I'm developing on Linux but endproduct with navigation will run on Android and iOS, so as long as these works fine I can sleep peacefully.

Best,
Marek