Running the Project tool will project input data into a new output. GDA94 MGA Zone 56 to GDA2020 MGA Zone 56 would require a transformation to be selected as the underlying GCS is different. You can change the transformation path as desired.įor example, projecting from GDA94 to GDA94 MGA Zone 56 does not require a transformation as the same datum is used for both. When a transformation is required, a drop-down list will be generated based on the input and output datums, and a default transformation will be selected. When transformation is required, no drop-down list will appear on the parameter, and it is left blank.
The Transformation parameter is optional. When running the tool, it will interpret the spatial reference of your input data and you can choose the output spatial reference. The tool will create an output, meaning your original input data will not be modified and you will have two copies of your data. You can use the Projecttool to project spatial data from one coordinate system to another. It does not modify the geometry of the input data it does not project or transform it into a new coordinate system.
You can identify the spatial reference of a layer in your Content or Catalog pane by right-clicking the item > Properties > Source > Spatial Reference.įor data sources with an incorrect or unknown coordinate system defined you can use the Define Projection tool to modify the coordinate system of the layer. This step is commonly performed when bringing data into your file or enterprise geodatabases. To adhere to organisational standards and to minimise errors while editing or performing analysis, it is good practice to transform the datum in the source data.
#How to determine projection of arcgis file pro
ArcGIS Pro 2.7 allows you to specify additional transformation methods not currently used in the map Working with spatial data sources These may not be currently used in the map, but can be saved for future use and for when the map is shared as a web layer. You can also specify the transformation being used between datums that have multiple.įrom ArcGIS Pro 2.7 you can now add additional transformations. Remember that transformation paths work in both directions, so the ‘GDA1994 to GDA 2020 1’ transformation will align your GDA94 GCS to GDA2020 maps and vice versa. To see what transformations are being applied you can move to the Transformations tab in the Map Properties Pane. The Map Properties Coordinate Systems tab shows coordinate systems currently used by layers in the map. This often resulted in features and feature classes being created without any spatial reference defined, a significant challenge for spatial data management. This is a change in behaviour to ArcMap, where the data frame coordinate system would be ‘undefined’ until the first operational layer was added. Subsequent layers added after the first will not continue to change the map’s chosen spatial reference.
For Esri basemaps, this means WGS1984 Web Mercator (auxiliary sphere). Before any layers are added, the map is soft set to use the basemap coordinate system. This means the first layer that is not a basemap sets the coordinate system for maps and local scenes. ArcGIS Pro Maps and Default Spatial Referencesīy default, Maps in ArcGIS Pro will use the spatial reference of the first operational layer added.
#How to determine projection of arcgis file how to
It is important to understand how this behaviour works, how to ensure your data in a different datums have correct transformations applied, and what options are available to change default behaviours. The map has a defined spatial reference, and this is what ArcGIS Pro uses as it attempts to align your data to the map. When you work with spatial data in ArcGIS Pro, you add datasets as layers to a Map.
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