Kirk, I am by no means an expert, so take any advice I give with a grain of salt.
First, you need to determine if QGIS is setting the right CRS. If it's not, setting the appropriate CRS may help you. I was having issues getting QGIS to project Michigan georef correctly. Apparently QGIS is unable to recognize a specific projection type of which Michigan Georef is. I was given a work-around (props to Howard Yamaguchi) which involves loading the file into uDIG (another open-source software) and performing a reprojection in the CRS I need. Therefore, it might be useful to import your shapefiles in uDIG. If they project correctly there, you could perform the operation (with the correct EPSG you want) that can be found here: http://www.townshipgis.com/resources/problems-and-workarounds/converting-michigan-georef-to-state-plane-using-open-source-tools Perhaps someone with a higher degree of familiarity can offer a more elegant solution. -- all the best, Lee Mueller ISA Certified Arborist Registered Forester #46043 On Thu, Mar 15, 2012 at 1:58 PM, Kirk Wythers <[email protected]>wrote: > > On Mar 15, 2012, at 12:14 PM, Lee wrote: > > Do you know what EPSG these files are supposed to be in as obtained? I > realize you would like to use them or reproject them to 3174, but what is > their native EPSG or CRS name? > > > I got the shape files from a colleague and am not sure. Here are the text > descriptions from the .prj files: > > File 1 > > GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]] > > File2 > > GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]] > > File3 > > PROJCS["WGS_1984_Web_Mercator",GEOGCS["GCS_WGS_1984_Major_Auxiliary_Sphere",DATUM["D_WGS_1984_Major_Auxiliary_Sphere",SPHEROID["WGS_1984_Major_Auxiliary_Sphere",6378137.0,0.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],UNIT["Meter",1.0]] > > > > > > > > On Thu, Mar 15, 2012 at 1:10 PM, Kirk Wythers <[email protected]>wrote: > >> I am having trouble with the crs of a particular project which contains 3 >> shape file layers. I have two layers with display properly relative to each >> other, however, I am dubious that the crs is correct, since they are lat >> long yet the scale bar is displaying meters. I have another shape file, >> that when read into qgis, does not display properly at all. >> >> I have tried turning off "on the fly" projections, loading one layer, >> then turning on "on the fly" for the other layers. I have also tried >> manually setting the project crs with to one of the layers. I have also >> tried manually setting the crs of each layer to EPSG 3174 (Great Lakes >> Albers). None of these approaches seems to have any effect on the problem. >> >> Ideally I would like all files to be EPSG 3174 with units of degrees as >> Lat Long. Any suggestions on how I should be approaching this? Thanks in >> advance. >> >> Here is the crs metadata for each file: >> >> FILE 1: >> Storage type of this layer: ESRI Shapefile >> Source for this layer: >> /Users/kirkw/Desktop/latlong/meanNH4_2002.2006CLIP.shp >> Geometry type of the features in this layer: Polygon >> The number of features in this layer: 2093 >> Editing capabilities of this layer: Add Features, Delete Features, >> Change Attribute Values, Add Attributes, Create Spatial Index, Fast Access >> to Features at ID, Change Geometries >> Extents: >> In layer spatial reference system units : xMin,yMin -95.917,43.0309 : >> xMax,yMax -83.2767,49.3746 >> Layer Spatial Reference System: >> +proj=aea +lat_1=42.122774 +lat_2=49.01518 +lat_0=45.568977 >> +lon_0=-84.455955 +x_0=1000000 +y_0=1000000 +ellps=GRS80 >> +towgs84=0,0,0,0,0,0,0 +units=m +no_defs >> >> FILE 2: >> Storage type of this layer: ESRI Shapefile >> Source for this layer: >> /Users/kirkw/Desktop/disturbance/reservelands/national_parks_boundaries_BTS_2006/national_parks_boundaries_BTS_2006.shp >> Geometry type of the features in this layer: Polygon >> The number of features in this layer: 555 >> Editing capabilities of this layer: Add Features, Delete Features, >> Change Attribute Values, Add Attributes, Create Spatial Index, Fast Access >> to Features at ID, Change Geometries >> Extents: >> In layer spatial reference system units : xMin,yMin -167.535,18.4641 : >> xMax,yMax -66.1064,68.6554 >> Layer Spatial Reference System: >> +proj=aea +lat_1=42.122774 +lat_2=49.01518 +lat_0=45.568977 >> +lon_0=-84.455955 +x_0=1000000 +y_0=1000000 +ellps=GRS80 >> +towgs84=0,0,0,0,0,0,0 +units=m +no_defs >> >> FILE 3: >> Storage type of this layer: ESRI Shapefile >> Source for this layer: >> /Users/kirkw/Desktop/disturbance/reservelands/Wilderness_Areas/Wilderness_Areas_12.1.11.shp >> Geometry type of the features in this layer: Polygon >> The number of features in this layer: 794 >> Editing capabilities of this layer: Add Features, Delete Features, >> Change Attribute Values, Add Attributes, Create Spatial Index, Fast Access >> to Features at ID, Change Geometries >> Extents: >> In layer spatial reference system units : xMin,yMin >> -19942895.95,2066644.91 : xMax,yMax 20012095.73,11022781.37 >> Layer Spatial Reference System: >> +proj=aea +lat_1=42.122774 +lat_2=49.01518 +lat_0=45.568977 >> +lon_0=-84.455955 +x_0=1000000 +y_0=1000000 +ellps=GRS80 >> +towgs84=0,0,0,0,0,0,0 +units=m +no_defs >> >> >> >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> > >
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