Accessing Relationship table from a Map Service

[AfrozAlam]

I am developing an iOS app on Xcode 14.2 using Swift 5.7 and ArcGIS Runtime SDK for iOS 100.15.

I am using a map service of Census Data (link as below).

https://khazna.gisqatar.org.qa/fed/rest/services/GISUDBAP/QSA_Census_District_2020/MapServer/

I want to access the Relationship table as listed in attached file QSA.Census_District_2020 (0). I couldn't find any code on developer community to do so. I would be very grateful if anyone can help me in this regards.

• BLD_Res_Bld_Type_2020_DL (0) -- Related To: BLD_Res_Bldg_Type_2020_DL (210)

Thanks & regards,

[DavidFeinzimer · Accepted solution]

Hi there, thank you for reaching out and sorry for the extended reply time.

The relationships table can be accessed by inspecting the mapImageSublayers property of a AGSArcGISMapImageLayer. Each sublayer will have sublayer info that contains a set of relationship infos.

I'll attach a modified version of the view controller that prototypes this out. It will print the following:

Loading MapServer...

Loaded

BLD_Res_Bld_Type_2020_DL

Est_Bldg_Type_2020_DL

Pop_Sex_2020_DL

Pop_Above15_Less15_2020_DL

HousingUnit_Density_2020_DL

Pop_NEcoRel2WrkFrce2020_DL

Pop_Abv10_Edu_Lev_2020_DL

BLD_BuildingStorey_2020_DL

Pop_Occupation_2020_DL

HousingUnit_Use_2020_DL

Est_by_Sector_2020_DL

Pop_Abv15MF_EcNEco_2020_DL

HousingUnit_Type_2020_DL

Pop_Sector_2020_DL

HHold_Indi_FamSze_2020_DL

Pop_AgeGroups_2020_DL

---

I hope this helps!

[AfrozAlam]

Dear David Feinzimer,

Thanks a lot for your great help. 

Afroz

[AfrozAlam]

Dear David Feinzimer,

Thanks a lot for your help. But now I am facing another issue. I am trying to populate a table with all the fields of a table Pop_Sex_2020_DL. It is populating but only one field though it has 3 fields. I am attaching the code with screen shots. I would be very grateful to you for your further help in this regard.

Thanks & regards

[DavidFeinzimer]

Hi Afroz, can you please indicate which URL value your using for the distService variable?

Thank you,

David

[AfrozAlam]

Hi David,

I want to get the values of  ENAME, ANAME & DIST_NO fields from table Pop_Sex_2020_DL from URL https://khazna.gisqatar.org.qa/fed/rest/services/GISUDBAP/QSA_Census_District_2020/MapServer/

Thanks,

Afroz

[DavidFeinzimer]

Hi Afroz, the fields ENAME, ANAME & DIST_NO should be accessible from the district feature layer.

I've attached a simplified version of the code. Tapping a green outlined district will produce a console message with the information. For example, tapping the airport:

I hope this helps!

David