[Geoserver-users] WCS Cell Size

GeoServer GeoServer User
1

Hello and good day,

I have what I think is a simple question. I am trying to make a WCS 1.1.1 GetCoverage request to a Geoserver running version 2.5

http://sedac.ciesin.columbia.edu/geoserver/ows?SERVICE=WCS&VERSION=1.1.1&REQUEST=GetCoverage&IDENTIFIER=species-v1-global-amphibian-family-richness&FORMAT=image%2Ftiff&BOUNDINGBOX=42.0,16.0,45.5,18.5,urn:ogc:def:crs:EPSG:4326&RangeSubset=contents&GridOffsets=0.008333,0.008333

For some reason the TIFF that is returned has an irregular cell size of: 0.005952381, 0.011666667

The expected cell size are the contents of GridOffsets=0.008333,0.008333

What am I doing wrong?

Many thanks,
Kytt

--
Kytt MacManus
Geographic Information Specialist
CIESIN
Earth Institute
Columbia University

Adjunct Lecturer
School of International and Public Affairs
Columbia University

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2

I’m not going to be of much help on this.

I’ve noticed some very odd stuff with WCS.

http://sedac.ciesin.columbia.edu/geoserver/ows?SERVICE=WCS&VERSION=1.1.1&REQUEST=DescribeCoverage&IDENTIFIERS=species-v1-global-amphibian-family-richness

Things I’ve observed are:

The offsets indicate a direction (sign) and distance from the origin. Your current origin is -179.991667 84.99436. Did you try defining the entire output grid in your KVP request to see if it gets you closer to what you want? (i.e., Adding your GridOrigin.)

Tim

···

On 04/09/2014 10:39 AM, Kytt MacManus wrote:

Hello and good day,

I have what I think is a simple question.  I am trying to make a WCS 
1.1.1 GetCoverage request to a Geoserver running version 2.5

[http://sedac.ciesin.columbia.edu/geoserver/ows?SERVICE=WCS&VERSION=1.1.1&REQUEST=GetCoverage&IDENTIFIER=species-v1-global-amphibian-family-richness&FORMAT=image%2Ftiff&BOUNDINGBOX=42.0,16.0,45.5,18.5,urn:ogc:def:crs:EPSG:4326&RangeSubset=contents&GridOffsets=0.008333,0.008333](http://sedac.ciesin.columbia.edu/geoserver/ows?SERVICE=WCS&VERSION=1.1.1&REQUEST=GetCoverage&IDENTIFIER=species-v1-global-amphibian-family-richness&FORMAT=image%2Ftiff&BOUNDINGBOX=42.0,16.0,45.5,18.5,urn:ogc:def:crs:EPSG:4326&RangeSubset=contents&GridOffsets=0.008333,0.008333)

For some reason the TIFF that is returned has an irregular cell size of: 
0.005952381, 0.011666667

The expected cell size are the contents of GridOffsets=0.008333,0.008333

What am I doing wrong?

Many thanks,
Kytt
3

Hi,
I’ve noticed both of your reports, but unfortunately I won’t have an occasion to look into them for some time,
as I’ll be away.

The WCS 1.1 service is mostly tested from XML requests, KVP have oddities (what is mandatory in
XML is not in KVP) I would not be surprised if there are issues there.

The demo section of GeoServer contains a “wcs request builder”, could you try with that one?
Anyways, do open bug reports if, after checking the WCS 1.1 spec, you still think you’re
stumbling into bugs.

http://jira.codehaus.org/browse/GEOS

Cheers
Andrea

···

On Thu, Sep 4, 2014 at 4:20 PM, Timothy Astle <timothy.astle@anonymised.com> wrote:

I’m not going to be of much help on this.

I’ve noticed some very odd stuff with WCS.

http://sedac.ciesin.columbia.edu/geoserver/ows?SERVICE=WCS&VERSION=1.1.1&REQUEST=DescribeCoverage&IDENTIFIERS=species-v1-global-amphibian-family-richness

Things I’ve observed are:

The offsets indicate a direction (sign) and distance from the origin. Your current origin is -179.991667 84.99436. Did you try defining the entire output grid in your KVP request to see if it gets you closer to what you want? (i.e., Adding your GridOrigin.)

Tim

On 04/09/2014 10:39 AM, Kytt MacManus wrote:

Hello and good day,

I have what I think is a simple question.  I am trying to make a WCS 
1.1.1 GetCoverage request to a Geoserver running version 2.5

[http://sedac.ciesin.columbia.edu/geoserver/ows?SERVICE=WCS&VERSION=1.1.1&REQUEST=GetCoverage&IDENTIFIER=species-v1-global-amphibian-family-richness&FORMAT=image%2Ftiff&BOUNDINGBOX=42.0,16.0,45.5,18.5,urn:ogc:def:crs:EPSG:4326&RangeSubset=contents&GridOffsets=0.008333,0.008333](http://sedac.ciesin.columbia.edu/geoserver/ows?SERVICE=WCS&VERSION=1.1.1&REQUEST=GetCoverage&IDENTIFIER=species-v1-global-amphibian-family-richness&FORMAT=image%2Ftiff&BOUNDINGBOX=42.0,16.0,45.5,18.5,urn:ogc:def:crs:EPSG:4326&RangeSubset=contents&GridOffsets=0.008333,0.008333)

For some reason the TIFF that is returned has an irregular cell size of: 
0.005952381, 0.011666667

The expected cell size are the contents of GridOffsets=0.008333,0.008333

What am I doing wrong?

Many thanks,
Kytt

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