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5

Yes, there is a way to do that. In the symbology palette for the overlay raster, you can select the Display Background Value (R, G, B) _ _ _ as ___ option (see screenshot for a raster I have doing the same thing with a white background. Assuming your background image is truly all white, your values will also be 255, 255, 255 in the boxes. Make sure to select ...


4

It looks like GDAL is describing the outer edge of the 'origin pixel' and Arcmap is refering to the center of the origin pixel. If you add half the resolution of a pixel they'll match fine. This definition is often different with different software, it doesnt really matter, though you should know what you're looking at so you can take it into account. One ...


3

You can block out the "white" using a Mask function, through the image analysis window. Change NoData Interpretation to "All", and add values 0 (minimum) and 250 (maximum) to all bands in your raster. As your image may contain "near white" values, you may want to lower the masking threshold to, say, 245. The "white" values will also depend on the pixel depth ...


2

I do this a lot with historic maps, and began by using @nicksan's method, but had the same issues the OP mentioned. I haven't used the mask method (will try soon) but here's what I do now, if you can deal with not having the red and blue in your overlay: Make sure you have Updated Georeferencing in the georeferencing toolbar and then remove the layer from ...


1

I would recommend using the raster or rgdal package(s) to read tiff files. This will also set you up for success in your second question, which not only needs to be a new question but also needs more than "how to locate pixels". In the raster package you can use "raster" for single band or stack for muntiband (e.g., RGB) tiff's. In rgdal you can use ...


1

There is a plugin that will solve this for you called the OpenLayers plugin that allows you to add Google, Bing and MapQuest basemaps to your project. With regards to the CRS check out this answer: Why does Google satellite layer change the project CRS? (You can use on the fly reprojection to help with this as well) Also bear in mind that there are licence ...


1

You might want to use the Openlayers plugin, which includes imagery from Google Satellite.


1

The answer by nicksan is good, though if your pdf was not be a perfectly-white background, you might have better luck removing it in image editing software rather than ArcGIS. After doing that, georeference the new image. There are a number of ways to do this. If you have access to Photoshop, you could try the magic wand tool. Other image editing ...


1

For getting DSM or a DTM some countrys have thier own DSM for free, for example in Spain is this page www.cnig.es, and you can download for free the DSM and DTM but only for Spain. Search if your country have similar system.



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