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How does projection on the fly work in ArcGIS?
All of the coordinates are permanently converted. Projection on the fly performs the same process as the Project tool, only the data does not change. It is merely displayed in the new coordinate system temporarily. Projection on the fly is what ArcGIS does to resolve conflicts when your data is in a different coordinate system than your map.
When to use a transformation in projection on the fly?
Transformations are one part of the process used by the Project tool and projection on the fly. If you are converting between different geographic coordinate systems (GCS), you need to use a transformation. In the example above, the map is in a projected coordinate system (PCS).
How to change the name of A reprojected layer?
Click on the Browse button next to the Save as field. Navigate to exercise_data/ and specify the name of the new layer as buildings_reprojected.shp. Leave the Encoding unchanged. Change the value of the Layer CRS dropdown to Selected CRS.
How does QGIS allow you to reproject data on the fly?
QGIS allows you to reproject data “on the fly”. What this means is that even if the data itself is in another CRS, QGIS can project it as if it were in a CRS of your choice. To enable “on the fly” projection, click on the CRS Status button in the Status Bar along the bottom of the QGIS window:
When does ArcMap not project on the fly?
ArcMap does not project data on the fly if the coordinate system for the data has not been defined or if the projection of the ArcMap data frame has not been set. A data set with an undefined coordinate system is displayed in the map based on the coordinate extent of the data.
How does ArcGIS Desktop work with raster data?
ArcGIS Desktop handles coordinate systems and georeferencing information differently than ArcInfo Workstation and ArcView GIS. Understanding the following concepts improves the ability to use raster data in ArcGIS Desktop as well as ArcInfo Workstation and ArcView GIS.
When is the data projected on the fly?
The new projection is used for display and query purposes only; the actual data is not altered. When is data projected on the fly? Data is projected on the fly anytime a data frame contains a layer whose coordinate system is defined as something different from the coordinate system definition of the data frame.
How to define a coordinate system for a shapefile?
Define the projection’s datum by selecting a predefined geographic coordinate system or defining a new geographic coordinate system. Afterward, you can modify the geographic coordinate system’s parameters if you want. Click OK . Click OK on the Shapefile Properties dialog box.
Where do I find projection on the fly?
In Map Properties, on the Transformation tab, you can see the transformations your map is currently using for projection on the fly. In this example, the transformation NAD 1983 CSRS To WGS 1984 2 is used. (The order specified in the name doesn’t matter.