[GRASS-user] Importing ESRI Grid file ... or Shapefile?

   The LiDAR data files do not have the same extent as the vector files, and
they should. I think I incorrectly imported them.

   There are two flavors of the files: ESRI Grid and Shapefiles.

   I used the Grid files, specifying hdr.adf as the file to use. But, since
the .prj file is specified when importing a shapefile I wonder if that's
what I need with the Grid format. The metadata.xml has these bounds:

  <westbc Sync="TRUE">-123.253402</westbc>
  <eastbcSync="TRUE">-123.131197</eastbc>
  <northbcSync="TRUE">45.002688</northbc>
  <southbcSync="TRUE">44.925436</southbc>
and
  <leftbc Sync="TRUE">600316.500000</leftbc>
  <rightbcSync="TRUE">631069.500000</rightbc>
  <bottombcSync="TRUE">1169386.500000</bottombc>
  <topbc Sync="TRUE">1196554.500000</topbc>

   Looks like both long/lat and Oregon State Plane coordinates are provided.

   The prj.adf file contains:
Projection LAMBERT
Datum HPGN
Spheroid GRS80
Units 3.280839895013123
Zunits NO
Xshift 0.0
Yshift 0.0
Parameters
   43 0 0.0 /* 1st standard parallel
   45 30 0.0 /* 2nd standard parallel
-120 30 0.0 /* central meridian
   41 45 0.0 /* latitude of projection's origin
400000.0 /* false easting (meters)
0.0 /* false northing (meters)

   The Shapefile for the area including my project has this projection:

PROJCS["Lambert Conformal Conic", GEOGCS["GCS North American 1983
HARN",DATUM["D North American 1983 HARN",SPHEROID["GRS 1980",6378137.0,298.257222101]],
PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],
PROJECTION["Lambert Conformal Conic"],
PARAMETER["False Easting",1312335.958005249],
PARAMETER["False Northing",0.0],
PARAMETER["Central Meridian",-120.5],
PARAMETER["Standard Parallel 1",43.0],
PARAMETER["Standard Parallel 2",45.5],
PARAMETER["Latitude Of Origin",41.75],
UNIT["Foot",0.3048]]

   Should I put these source files in the WGS84-lat-long location, the
Oregon-ll83 location, or the project location which is the Oregon State
Plane projection? And, do I import the Grid or shapefile? I'm confused.

TIA,

Rich

Rich Shepard wrote

The LiDAR data files do not have the same extent as the vector files, and
they should. I think I incorrectly imported them.

   There are two flavors of the files: ESRI Grid and Shapefiles.

   I used the Grid files, specifying hdr.adf as the file to use. But,
since
the .prj file is specified when importing a shapefile I wonder if that's
what I need with the Grid format. The metadata.xml has these bounds:

<westbc Sync="TRUE">
-123.253402
</westbc>
  &lt;eastbcSync=&quot;TRUE&quot;&gt;-123.131197
</eastbc>
  &lt;northbcSync=&quot;TRUE&quot;&gt;45.002688
</northbc>
  &lt;southbcSync=&quot;TRUE&quot;&gt;44.925436
</southbc>
and
  
<leftbc Sync="TRUE">
600316.500000
</leftbc>
  &lt;rightbcSync=&quot;TRUE&quot;&gt;631069.500000
</rightbc>
  &lt;bottombcSync=&quot;TRUE&quot;&gt;1169386.500000
</bottombc>
  
<topbc Sync="TRUE">
1196554.500000
</topbc>
   Looks like both long/lat and Oregon State Plane coordinates are
provided.

   The prj.adf file contains:
Projection LAMBERT
Datum HPGN
Spheroid GRS80
Units 3.280839895013123
Zunits NO
Xshift 0.0
Yshift 0.0
Parameters
   43 0 0.0 /* 1st standard parallel
   45 30 0.0 /* 2nd standard parallel
-120 30 0.0 /* central meridian
   41 45 0.0 /* latitude of projection's origin
400000.0 /* false easting (meters)
0.0 /* false northing (meters)

   The Shapefile for the area including my project has this projection:

PROJCS["Lambert Conformal Conic", GEOGCS["GCS North American 1983
HARN",DATUM["D North American 1983 HARN",SPHEROID["GRS
1980",6378137.0,298.257222101]],
PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],
PROJECTION["Lambert Conformal Conic"],
PARAMETER["False Easting",1312335.958005249],
PARAMETER["False Northing",0.0],
PARAMETER["Central Meridian",-120.5],
PARAMETER["Standard Parallel 1",43.0],
PARAMETER["Standard Parallel 2",45.5],
PARAMETER["Latitude Of Origin",41.75],
UNIT["Foot",0.3048]]

   Should I put these source files in the WGS84-lat-long location, the
Oregon-ll83 location, or the project location which is the Oregon State
Plane projection? And, do I import the Grid or shapefile? I'm confused.

TIA,

Rich

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And, do I import the Grid or shapefile?

It depends which data you need :

- Shape file: vector data
- Esri Grid: raster data

so these data may be/are different.

a common workflow I do with data in different projections:

- Defiine a projection in which you want to do your analysisi(1)s
- Reproject data in different projections than (1) either by
gdalwarp'ed/ogr2ogr or by v.proj/r.proj to this srs/projection

In this way data projection mixing can be avoided.

-----
best regards
Helmut
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On Sat, 10 Sep 2016, Helmut Kudrnovsky wrote:

It depends which data you need :

- Shape file: vector data
- Esri Grid: raster data

so these data may be/are different.

a common workflow I do with data in different projections:

- Defiine a projection in which you want to do your analysisi(1)s
- Reproject data in different projections than (1) either by
gdalwarp'ed/ogr2ogr or by v.proj/r.proj to this srs/projection

In this way data projection mixing can be avoided.

Helmut,

   Good advice and clarification. This completely answers my question.

Thanks,

Rich