Re: [OpenMap Users] BIL and VPF Format Questions

Hi Paul,

On Wednesday, November 6, 2002, at 03:05 AM, Paul Chisholm wrote:

> A couple of questions:
>
> 1) BIL Format
>
> I have a raster dataset in BIL format. I see no mention of this in the
> documentation so I guess its not supported. Is there any way to
> convert BIL
> format data to a format supported by OpenMap?

I don't know that much about the BIL format. If you can find a Java
method for reading it in, though, it wouldn't be that hard to use it
after that.

> 2) VPF Format
>
> I have a vector dataset in VPF format and I am running the DescribeDB
> utility as stated in the OpenMap faq. When I run it I get the following
> output:
>
> *****************************
> Path to database: Global_Map
> Database Name: globalm
> Database Description: Generated Digital data based on the Global Map
> Specification.
> Database Libraries: area
>
> area:
> area:uses tiled data
> area:Coverage names:pop bnd trans tileref hydro
> area:pop:Coverage Description: Population
> area:pop:Coverage Topology Level: 3
> CoverageTable: java.io.FileNotFoundException: BinaryFile can't find:
> Global_Map/area/pop//fcs.
> area:pop:FeatureClassNames:
> area:bnd:Coverage Description: Boundaries
> area:bnd:Coverage Topology Level: 3
> CoverageTable: java.io.FileNotFoundException: BinaryFile can't find:
> Global_Map/area/bnd//fcs.
> area:bnd:FeatureClassNames:
> area:trans:Coverage Description: Transportation
> area:trans:Coverage Topology Level: 3
> CoverageTable: java.io.FileNotFoundException: BinaryFile can't find:
> Global_Map/area/trans//fcs.
> area:trans:FeatureClassNames:
> area:tileref:Coverage Description: Tile Reference
> area:tileref:Coverage Topology Level: 3
> area:tileref:FeatureClassNames:
> area:hydro:Coverage Description: Hydrography
> area:hydro:Coverage Topology Level: 3
> CoverageTable: java.io.FileNotFoundException: BinaryFile can't find:
> Global_Map/area/hydro//fcs.
> area:hydro:FeatureClassNames:
> *******************************
>
> The first exception says it cant find file
>
> Global_Map/area/pop//fcs
>
> there is no such file, but there is a file
>
> Global_Map/area/population/fcs
>
> The '//' is rather strange. In Windows if you put '\\' in a path it
> treats
> it just like '\', but there may be a problem in the translation
> between Java
> and Windows.

I'm not sure why that hasn't been a problem before, unless prior
versions of Java on Windows handled file paths differently.

>> From the output it seems OpenMap knows there is a correspondence
>> between
> 'pop' and 'population', but why does it put 'pop' in the path instead
> of
> 'population'?

That's a vpf database question - that's just how it is stored in the
files.

> I am using OpenMap 4.5.3, Java 1.4.1, Windows 2000

The code in CoverageAttributeTable.java looks like it automatically
adds a '/' in front of fcs paths. I'll modify the code to have it
check to see if it needs it.

- Don

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Don Dietrick, BBN Technologies, dietrick@bbn.com
10 Moulton Street, Cambridge, MA 02138
617-873-3031 [fax]-2794
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

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