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Is it possible to reproject a model (move it from one coordinate system to another) in WaterGEMS, HAMMER or SewerGEMS? For example migrating from NAD27 to NAD83.
First, assess if it may be appropriate to simply move all the model elements to the new coordinate system location instead of performing a reprojection/transformation. This likely will not be ideal in most cases, as it often needs to be distorted / warped and each type of projection can do this in a different way. For example, going from NAD27 to NAD83 in particular has some challenges. See the link below under the "See Also" section.
As of version the SELECTseries 6 release of WaterGEMS/HAMMER and the SELECTseries 5 release of SewerGEMS, there is no direct tool for performing a Reprojection in standalone or ArcMap-integrated mode. However, if you have Esri ArcGIS, you can utilize the "Project" tool from ArcToolbox. Note that when doing this, you must create a new feature dataset. Unfortunately, this breaks the link between the WaterGEMS database and the geodatabase. Please follow these steps for a workaround:1) Backup your model.2) Use the ArcToolbox "Project" tool to reproject the WaterGEMS model's associated personal geodatabase. Choose a new feature dataset in the same geodatabase, with a different name.3) When done, delete the original feature dataset and then rename the newly projected dataset to the old name. You will also need to rename each feature class (PRV, pipe, junction, etc) since a '_1' will be appended to the end. Remove the '_1' from each of these.4) Close ArcToolbox and open the geodatabase in a database program such as Microsoft Access. Locate the table named "GDB_ObjectClasses" and note the range of numbers in the "ID" field (the first number at the top, in particular)5) Close this table and open the table named "WaterGEMSClassMap". You will see a table for "FeatureClassId". Basically, these numbers no longer match up with the ID's you saw in the "GDB_ObjectClasses". You must renumber this field, matching the "FeatureClassId" to the same feature class type (PRV, pipe, etc) from "GDB_ObjectClasses". Most likely, you can simply start with the lowest number you saw in "GDB_ObjectClasses" and increment up from there.6) Open the project in ArcMap. It will appear to be reprojected but in actuality, the WaterGEMS database has not been updated with the new geometry. Export all the layers (pipe, PRV, junction, etc) to shapefiles. This will ensure that labels are exported with it.7) Close ArcMap and open the .wtg file in WaterGEMS standalone. Run ModelBuilder, using all of the exported shapefiles as the source.8) Uncheck all spatial creation options and choose only the label fields for the table linkings for each element type. This should synchronize just the geometry (x/y)9) Open the project in ArcMap. Both the geodatabase and the WaterGEMS database should be in agreement.In WaterCAD, since you cannot integrate with ArcGIS, you would need to export each element type to a shapefile (via the export button in the flextables), reproject in ArcGIS, then update the geometry using Modelbuilder.
http://resources.esri.com/help/9.3/arcgisengine/java/gp_toolref/coverage_toolbox/transforming_between_nad27_and_nad83.htmhttp://communities.bentley.com/products/hydraulics___hydrology/f/5925/p/7101/10556#10556