CESSNA C210 PLT ENRTE TRANSITS CYDB ARPT AREA.

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THE USA SECTIONAL SHOWS BURWASH AS AN OPEN; MAGENTA CIRCLE. NO TWR; NO CLASS D DEPICTION. THE GARMIN 396 DOES NOT DEPICT CLASS D. NEITHER HAS ANY INDICATION THAT ANY COM IS REQUIRED. HOWEVER; WHEN I WAS TALKING TO THE EDMONTON SHIFT MGR AT EDMONTON CTR THE NEXT DAY. HE SAID THAT I SHOULD HAVE CALLED THE BURWASH MANDATORY FREQ WHEN I LANDED AT BURWASH. HE SAID THAT I CALLED WHITEHORSE ON 126.7 BUT THAT IS NOT THE CORRECT MANDATORY FREQ FOR BURWASH. I DID NOT LAND AT BURWASH. I DID HEAR RADIO CALLS FROM WHAT SOUNDED LIKE 2 OTHER ACFT OPERATING INTO OR OUT OF THE BURWASH ARPT. I WAS CALLING WHITEHORSE ON 126.7 TO GET THE WX AT WHITEHORSE; WHICH WAS OUR DEST. WE FLEW FROM ANC TO CYXY NON-STOP. WHITEHORSE DID NOT REPLY TO MY ATTEMPTS TO CONTACT THEM WHEN I FLEW PAST; E OF BURWASH. THE RADIO CONTACT ON THE MANDATORY FREQ IS REQUIRED BY THE FARS IF YOU FLY CLOSER THAN 5 NM OF BURWASH AND BELOW 5700 FT MSL (ASL IN CANADA). I BELIEVE I WAS HIGHER THAN 5700 FT MSL; BUT I COULD BE MISTAKEN. THE USA WHITEHORSE SECTIONAL MISLEADS A UNITED STATES PLT INTO THINKING THAT HE OR SHE DOES NOT NEED TO ESTABLISH RADIO CONTACT. THE CANADIAN SECTIONAL SHOWS A TINY 'M' (FOR MANDATORY FREQ); BUT TO FINAL OUT THE HT; LATERAL EXTENT AND DATES AND HRS WHEN RADIO CALLS ARE REQUIRED; YOU HAVE TO READ THE CANADIAN SUPPLEMENT FOR EVERY LITTLE ARPT.