You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@sis.apache.org by "Martin Desruisseaux (Jira)" <ji...@apache.org> on 2022/04/01 10:59:00 UTC
[jira] [Updated] (SIS-540) Add an ESRI ASCII Grid reader and writer
[ https://issues.apache.org/jira/browse/SIS-540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Desruisseaux updated SIS-540:
------------------------------------
Description:
Add a reader and writer for ESRI ASCII Grid format. This is a very simple format easy to implement, and used commonly enough for being worth to be supported. See the [Wikipedia page|https://en.wikipedia.org/wiki/Esri_grid] for a format description.
The reader/writer to implement in SIS are ports from the Geotk {{AsciiGridReader}} and {{AsciiGridWriter}} classes. Compared to the ESRI ASCII Grid format, the SIS implementation will have the following extensions. The 2 first extensions in this list exist also in GDAL:
* Coordinate reference system specified by auxiliary {{*.prj}} file. If the format is WKT 1, the GDAL variant is used (that variant differs from the OGC 01-009 standard in their interpretation of units of measurement).
* {{DX}} and {{DY}} parameters in the header are used instead of {{CELLSIZE}} if the pixels are non-square.
* The {{'='}} or {{':'}} characters can be used as separators between keys and values in the header.
* Lines in the header starting with {{'#'}} are ignored as comment lines.
was:Add a reader and writer for ESRI ASCII Grid format. This is a very simple format easy to implement, and used commonly enough for being worth to be supported. See the [Wikipedia page|https://en.wikipedia.org/wiki/Esri_grid] for a format description.
> Add an ESRI ASCII Grid reader and writer
> ----------------------------------------
>
> Key: SIS-540
> URL: https://issues.apache.org/jira/browse/SIS-540
> Project: Spatial Information Systems
> Issue Type: New Feature
> Components: Storage
> Affects Versions: 1.1
> Reporter: Martin Desruisseaux
> Assignee: Martin Desruisseaux
> Priority: Major
> Fix For: 1.2
>
>
> Add a reader and writer for ESRI ASCII Grid format. This is a very simple format easy to implement, and used commonly enough for being worth to be supported. See the [Wikipedia page|https://en.wikipedia.org/wiki/Esri_grid] for a format description.
> The reader/writer to implement in SIS are ports from the Geotk {{AsciiGridReader}} and {{AsciiGridWriter}} classes. Compared to the ESRI ASCII Grid format, the SIS implementation will have the following extensions. The 2 first extensions in this list exist also in GDAL:
> * Coordinate reference system specified by auxiliary {{*.prj}} file. If the format is WKT 1, the GDAL variant is used (that variant differs from the OGC 01-009 standard in their interpretation of units of measurement).
> * {{DX}} and {{DY}} parameters in the header are used instead of {{CELLSIZE}} if the pixels are non-square.
> * The {{'='}} or {{':'}} characters can be used as separators between keys and values in the header.
> * Lines in the header starting with {{'#'}} are ignored as comment lines.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)