QGIS to update MapInfo model: Difference between revisions
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Follow these steps: |
Follow these steps: |
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<ol> |
<ol> |
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<li> Open QGIS. |
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<li> Familarise yourself with the projection of the MapInfo files used by the model. |
<li> Familarise yourself with the projection of the MapInfo files used by the model. You can do this using QGIS: |
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* Drag a mif file from the existing model into the Map Window of QGIS. The will open it for viewing. Editing the read only file in QGIS is not possible. |
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* Right click the MapInfo File in the QGIs Layer Panel and select Properties. |
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* Select "Information" and review the CRS details. |
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<li> Initialise your QGIS session using the TUFLOW Plugin: |
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* Select ''Plugins >> TUFLOW >> Edditing > Create/Configure TUFLOW Project''. |
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* Select the open MapInfo file via the ''Source Project Layer'' drop menu. this will populate the Projection infromation for you. |
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* Select the folder that contains the TUFLOW model. |
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* Select the TUFLOW Executable location. |
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* Tick TUFLOW Classic / HPC |
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* Tick Save Default Settings |
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* Tick Create Model Folder Structure. This will add any missing folders to the existing folder structure (eg. TUFLOW/gis) |
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* Tick Create Template Files. This will create the QGIS empty template files for any future additons to the model. |
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<li> Open the two TCF Files: |
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*''TUFLOW/runs/Create_Empties.tcf''; and |
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* The TCF for the existing TUFLOW model using the MapInfo format inputs. |
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<li> Copy the following command line to clipboard from ''Create_Empties.tcf'': <font color="blue"><tt>SHP Projection</tt></font> <font color="red"><tt>==</tt></font><tt> ..\model\gis\Projection.prj</tt> |
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<li> Paste the command to the TCF for the existing TUFLOW model using the MapInfo format inputs below, <font color="blue"><tt>MI Projection</tt></font> <font color="red"><tt>==</tt></font> |
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<li> Save the command below <font color="blue"><tt>SHP Projection</tt></font> <font color="red"><tt>==</tt></font><tt> ..\model\gis\Projection.prj</tt> |
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</tt> in the MapInfo model TCF file. |
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<li> Also in the MapInfo model TCF file, change the command <font color="blue"><tt>GIS Format</tt></font> <font color="red"><tt> == </tt><tt>MIF</tt> to <font color="blue"><tt>GIS Format</tt></font> <font color="red"><tt> == </tt><tt>SHP</tt> |
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MI Projection == ..\model\mi\Projection.mif ! Sets the GIS projection for the TUFLOW Model |
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Write Empty GIS Files == ..\model\gis\empty |
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</ol> |
</ol> |
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Revision as of 15:44, 16 June 2021
Can I use QGIS for a model originally developed in MapInfo? The answer is, yes.
TUFLOW models can use a combination of MapInfo MIF/MID and QGIS SHP files. The existing MapInfo files can be left in their current form and new updates can be added using SHP format.
Follow these steps:
- Open QGIS.
- Familarise yourself with the projection of the MapInfo files used by the model. You can do this using QGIS:
- Drag a mif file from the existing model into the Map Window of QGIS. The will open it for viewing. Editing the read only file in QGIS is not possible.
- Right click the MapInfo File in the QGIs Layer Panel and select Properties.
- Select "Information" and review the CRS details.
- Initialise your QGIS session using the TUFLOW Plugin:
- Select Plugins >> TUFLOW >> Edditing > Create/Configure TUFLOW Project.
- Select the open MapInfo file via the Source Project Layer drop menu. this will populate the Projection infromation for you.
- Select the folder that contains the TUFLOW model.
- Select the TUFLOW Executable location.
- Tick TUFLOW Classic / HPC
- Tick Save Default Settings
- Tick Create Model Folder Structure. This will add any missing folders to the existing folder structure (eg. TUFLOW/gis)
- Tick Create Template Files. This will create the QGIS empty template files for any future additons to the model.
- Open the two TCF Files:
- TUFLOW/runs/Create_Empties.tcf; and
- The TCF for the existing TUFLOW model using the MapInfo format inputs.
- Copy the following command line to clipboard from Create_Empties.tcf: SHP Projection == ..\model\gis\Projection.prj
- Paste the command to the TCF for the existing TUFLOW model using the MapInfo format inputs below, MI Projection ==
- Save the command below SHP Projection == ..\model\gis\Projection.prj in the MapInfo model TCF file.
- Also in the MapInfo model TCF file, change the command GIS Format == MIF to GIS Format == SHP MI Projection == ..\model\mi\Projection.mif ! Sets the GIS projection for the TUFLOW Model Write Empty GIS Files == ..\model\gis\empty
- Use the same projection as MapInfo files and add SHP Projection == ..\model\gis\Projection.prj to the MI Projection command. Both should be included in the model.
- Replace GIS Format == MIF with GIS Format == SHP. This will apply to check files and results.
- Create empty TUFLOW files with Write Empty GIS Files == ..\model\gis\empty. These will automatically generate SHP format files when GIS Format == SHP is specified.
If changes need to be made to existing MapInfo layers, use QGIS to convert MIF to SHP by either:
- Exporting MIF files to shapefiles.
- Copying MIF features (points, lines and polygons separately) into a TUFLOW empty file in shapefile format.
After the conversion, attributes should be checked if they were transferred correctly.
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