Bug report #13835

Shapefiles with EPSG 2926 and 2927 Washington State Plane North and South not recognized

Added by clifford snow over 4 years ago. Updated about 4 years ago.

Status:Closed
Priority:Normal
Assignee:-
Category:Projection Support
Affected QGIS version:2.12.0 Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:21859

Description

When opening shapefiles from Washington county and state agencies, QGIS defaults to USER:10000X projection instead of either EPSG 2926 or 2927. Both of the projections are in QGIS.

This doesn't impact QGIS use, but as someone new to QGIS and projections, it would help if QGIS recognized and displayed the projection.

Attached is a copy of Pierce County GIS Roads .prj shapefile. Full shapefiles are available at http://gisdata.piercecowa.opendata.arcgis.com/datasets?q=Roads%2FRails

Roads-Named.prj (554 Bytes) clifford snow, 2016-01-11 07:12 PM

History

#1 Updated by Giovanni Manghi over 4 years ago

  • Operating System deleted (mac os x and ubuntu)
  • Category set to Projection Support
  • Status changed from Open to Feedback
  • OS version deleted (10.10.5 and 15.04)

2927 is

+proj=lcc +lat_1=47.33333333333334 +lat_2=45.83333333333334 +lat_0=45.33333333333334 +lon_0=-120.5 +x_0=500000.0001016001 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=us-ft +no_defs

this shapefiles have

+proj=lcc +lat_1=47.33333333333334 +lat_2=45.83333333333334 +lat_0=45.33333333333334 +lon_0=-120.5 +x_0=500000.0001016002 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=us-ft +no_defs

there is one tiny difference, but that is enough to make qgis think is a different CRS.

The definition on spatialreference.org is

http://spatialreference.org/ref/epsg/2927/proj4/

... +x_0=500000.0001016001 ...

#2 Updated by clifford snow over 4 years ago

Changing the longitude to match the .prj file (+x_0=500000.0001016001 to +x_0=500000.0001016002) made no difference.) I also removed the system generated projections, 100001 with no change. QGIS still did not match the projection.

#3 Updated by Jürgen Fischer over 4 years ago

  • Subject changed from Shapefiles with EPSG 2926 and 2927 Washington State Plane North and South not recongized to Shapefiles with EPSG 2926 and 2927 Washington State Plane North and South not recognized

#4 Updated by Giovanni Manghi over 4 years ago

does not seems a qgis issue to me, but rather a data one. This is what OGR says about the projection of the downloaded data, as you can see there is no "authority" parameter

[email protected]:~/Desktop/Railroads > ogrinfo -so Railroads.shp Railroads
INFO: Open of `Railroads.shp'
using driver `ESRI Shapefile' successful.

Layer name: Railroads
Geometry: Line String
Feature Count: 163
Extent: (1093512.041297, 512003.733156) - (1230069.994152, 722811.599874)
Layer SRS WKT:
PROJCS["NAD83_HARN_Washington_South_ftUS",
GEOGCS["GCS_NAD83(HARN)",
DATUM["NAD83_High_Accuracy_Reference_Network",
SPHEROID["GRS_1980",6378137,298.257222101]],
PRIMEM["Greenwich",0],
UNIT["Degree",0.017453292519943295]],
PROJECTION["Lambert_Conformal_Conic_2SP"],
PARAMETER["standard_parallel_1",47.33333333333334],
PARAMETER["standard_parallel_2",45.83333333333334],
PARAMETER["latitude_of_origin",45.33333333333334],
PARAMETER["central_meridian",-120.5],
PARAMETER["false_easting",1640416.667],
PARAMETER["false_northing",0],
UNIT["Foot_US",0.30480060960121924]]
OBJECTID: Integer (10.0)
PCID: String (80.0)
RouteID: String (80.0)
Fm: String (80.0)
Tm: String (80.0)
Source: String (80.0)
OwnerName: String (80.0)
OwnerCode: String (80.0)
EditBy: String (80.0)
EditOn: String (80.0)
Type: String (80.0)
DataSource: String (80.0)

After giving the layer the proper projection 2927 the paramter is correctly recognized

[email protected]:~/Desktop/Railroads > ogrinfo -so Railroads.shp Railroads
INFO: Open of `Railroads.shp'
using driver `ESRI Shapefile' successful.

Layer name: Railroads
Geometry: Line String
Feature Count: 163
Extent: (1093512.041297, 512003.733156) - (1230069.994152, 722811.599874)
Layer SRS WKT:
PROJCS["NAD83 / Washington South (ftUS)",
GEOGCS["NAD83",
DATUM["NAD83_High_Accuracy_Reference_Network",
SPHEROID["GRS 1980",6378137,298.257222101,
AUTHORITY["EPSG","7019"]],
TOWGS84[0,0,0,0,0,0,0],
AUTHORITY["EPSG","6152"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4152"]],
PROJECTION["Lambert_Conformal_Conic_2SP"],
PARAMETER["standard_parallel_1",47.33333333333334],
PARAMETER["standard_parallel_2",45.83333333333334],
PARAMETER["latitude_of_origin",45.33333333333334],
PARAMETER["central_meridian",-120.5],
PARAMETER["false_easting",1640416.667],
PARAMETER["false_northing",0],
UNIT["US survey foot",0.3048006096012192,
AUTHORITY["EPSG","9003"]],
AXIS["X",EAST],
AXIS["Y",NORTH],
AUTHORITY["EPSG","2927"]]
OBJECTID: Integer (10.0)
PCID: String (80.0)
RouteID: String (80.0)
Fm: String (80.0)
Tm: String (80.0)
Source: String (80.0)
OwnerName: String (80.0)
OwnerCode: String (80.0)
EditBy: String (80.0)
EditOn: String (80.0)
Type: String (80.0)
DataSource: String (80.0)

#5 Updated by clifford snow over 4 years ago

Typically I don't see authority parameters in .prj files. For example below is an ogrinfo report for a Census roads file for Franklin County, Washington, pulled this morning, that QGIS reports as EGPS:4269

ogrinfo -so tl_2015_53021_roads.shp tl_2015_53021_roads
INFO: Open of `tl_2015_53021_roads.shp'
using driver `ESRI Shapefile' successful.

Layer name: tl_2015_53021_roads
Geometry: Line String
Feature Count: 2944
Extent: (-119.453704, 46.202270) - (-118.203138, 46.738730)
Layer SRS WKT:
GEOGCS["GCS_North_American_1983",
DATUM["North_American_Datum_1983",
SPHEROID["GRS_1980",6378137,298.257222101]],
PRIMEM["Greenwich",0],
UNIT["Degree",0.017453292519943295]]
LINEARID: String (22.0)
FULLNAME: String (100.0)
RTTYP: String (1.0)
MTFCC: String (5.0)

#6 Updated by Giovanni Manghi over 4 years ago

  • Status changed from Feedback to Closed
  • Resolution set to invalid

clifford snow wrote:

Typically I don't see authority parameters in .prj files. For example below is an ogrinfo report for a Census roads file for Franklin County, Washington, pulled this morning, that QGIS reports as EGPS:4269

right, but anyway the rationale does not change: QGIS internal CRS DB is made of standard EPSG definition, if a layer has a CRS that does not match (exactly) any of them then QGIS adds the layer with a custom CRS, that still works. You can always (easily) force QGIS to recreate the prj file and give such layers the correct EPSG definition for the CRS. I can't see any QGIS bug here, but of course if I'm wrong please reopen this ticket.

#7 Updated by clifford snow over 4 years ago

  • Status changed from Closed to Reopened

I'd like to reopen this after discovering prj2epsg.org run by Boundless. When I plug in the .prj (below) the site returns 2285. (I was surprised.) I believe QGIS should return the same.

PROJCS["NAD_1983_StatePlane_Washington_North_FIPS_4601_Feet",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]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1640416.666666667],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-120.8333333333333],PARAMETER["Standard_Parallel_1",47.5],PARAMETER["Standard_Parallel_2",48.73333333333333],PARAMETER["Latitude_Of_Origin",47.0],UNIT["Foot_US",0.3048006096012192]]

#8 Updated by Giovanni Manghi over 4 years ago

  • Status changed from Reopened to Feedback
  • Resolution deleted (invalid)

clifford snow wrote:

I'd like to reopen this after discovering prj2epsg.org run by Boundless. When I plug in the .prj (below) the site returns 2285. (I was surprised.) I believe QGIS should return the same.

[...]

can you attach the data in 2285?

#9 Updated by clifford snow over 4 years ago

Attached is the proj file from Skagit County Roads-Named.shp.

#10 Updated by Josiah Wahlrab over 4 years ago

I believe this comes down to how ESRI and QGIS handle projections differently. A similar situation is described in this blog post. I don't believe this to be a QGIS bug, but I do think it would be super useful for QGIS to be able to discern projections like prj2epsg.

#11 Updated by Giovanni Manghi about 4 years ago

  • Status changed from Feedback to Closed

closed in favor of #14871

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