Why a suburb may appear as a major city
A birth-location field may accept a small suburb, but the software’s place database may not treat every neighborhood or municipality as a distinct display location. It can associate the entry with a nearby metropolitan center and show that better-known city instead. The result is a readable, standardized label—not necessarily the exact place where the person was born.
This is a form of location simplification: many nearby places are represented by one familiar reference point. It can make results easier to identify, but it also blurs the difference between a large city and the smaller communities around it.
What the substitution changes
For a birth-chart tool, the displayed city and the coordinates used in a calculation are not always the same thing. The software may use a location associated with the selected entry, so substituting a nearby center can mean using a slightly different point on the map. How much that matters depends on the distance and the tool’s calculations; the city name alone does not reveal exactly which coordinates were used.
That is why someone can recognize the nearby city on screen yet still want to check the selected location if precision matters. A familiar metropolitan label is convenient, but it can quietly stand in for a very different hometown.
