Identifying projection for shapefile with unknown coordinate system, no z values and no measures? [duplicate]

Question

I am attempting to create a GIS Project with multiple Brazilian cities. I have been collecting, and am interested in, shapefiles that delineate the neighborhood boundaries of said cities.

One city's shape file that I have acquired is for Curitiba, Paraná (PR), Brazil. I obtained the city-neighborhood shape file from here: Institute of Research and Urban Planning: Curitiba. You will find the file under "Divisa de Bairros" (Neighborhood Divisions).

I am using Quantum GIS to overlay these city shape files over Google Maps, because ultimately I may need to incorporate street or highway information in to my analysis. I am ambivalent ultimately about which source I use, and am open to solutions using Open Streets if possible.

I have read the GIS help files and followed the process to view the metadata in ArcMap to see what the coordinate system and/or projection system is for this shapefile. However, on reviewing the metadata it says that the coordinates have "No Z Values" and "No measures" and there is not defined coordinate system.

My question is: How can I fix this coordinate/measurement issue so that I can correctly project the location of the Curitiba city shapefile on either the Google Maps or Open Streets projections so that I may move forward with my project?

Note: I have already contacted the creator(s) of the files and asked if they may provide any additional information. I will post or answer my own question as need be.

Answer 1

On the page that you linked to, there is a note on the bottom:

DATUM: SAD-69/original

PROJEÇÃO CARTOGRÁFICA: UTM-22 (-51º)

OBS.: Devido ao uso do DATUM SAD-69/original por Curitiba, para converter para SIRGAS-2000, devem-se utilizar os parâmetros locais de transformação de coordenadas descritos abaixo:

SAD-69/original(Curitiba) -> SIRGAS-2000

dX = -66,163 m

dY = 2,028 m

dZ = -33,718 m

In English (via Google Chrome, blame/thank it for the translation):

DATUM: SAD-69 / original

Cartographic Projection: UTM-22 (-51º)

NOTE: Due to the use of the DATUM-SAD 69 / original by Curitiba, to convert to SIRGAS-2000, should be using the parameters of local coordinate transformation described below:

This projection needs to be applied to the data you downloaded; I don't know the exact tool in QGis to accomplish this, but there are doubtless tutorials and/or other GIS.se members who can help in that regard.