- If your data is not geo-referenced to begin with use the
- Add the image(layer) that has the correct geo-reference information into your ArcMap,
- Add your un-referenced image in your ArcMap
- Right-click in the menu area and add the
georeferencing tool shown above.
- In the layer dropdown menu select your raw-image(not-georeferenced).
- Zoom to the baseline image by right-clicking on it and clicking
zoom to layer.
- from the georeferencing tool (drop-down menu) click
Fit to Display ( this will focus the raw image in context to the baseline image, repeat this as many times as you need to align most of the features you want to align visually.You do this by zooming in/out or panning of your baseline image and clicking
Fit to Display until the match is acceptable to easily map points between the two layers. The close it is to the scale of the referenced image the easier it is when you do the referencing.
- using the
Add control points button (second from last in the image above- two +signs connected with a line) start marking areas from the unknown to the referenced layer. Here make sure you select locations (these are called control points) you know are the same as the locations in your geo-referenced image. Always map from the unknown to the known..not the other way round.
- Finally, if you are happy with what you see, click on the geo-referencing drop-down menu and select
rectify then save your newly rectified image. (depending on the number of control points you have you can select a number of transformation terms. 1st deg, 2nd deg. etc.. polynomial or spline, won't hurt reading upon that as this is not the place to expand on the subject)
NOTE: Your accuracy depends on both the quality and quantity of your control points, However if you have really accurate control points even 4 points (1 at each corner of the image) can give you good result.
here is a geo-referencing video I found on youtube to start with, I haven't watched it to the end. You can also read up on ESRI help on the tool itself.
For your shapefile use the tool suggested by @William.
- If your data is geo-referenced but you need to re-project it: Use the
Project raster tool shown below:
IN the input raster -> your image location, output raster dataset -> your output name, Output Coordinate system -> click on the hand icon and navigate through the 'import' button that appears to find the raster file that you know already has the projection you want to copy, Parametrize the 'Environments' options as necessary and click OK
For the shape file use the
project function you find under the
Feature group in the
projections and transformations toolbox.