#ER MAPPER ECW COMPRESSOR 64 BIT#
#ER MAPPER ECW COMPRESSOR TRIAL#

*I'm not fully clear on the compression process, but in terms of the 20:1 compression.

If you still have it you can run the same process on a 64-bit program if you would like to compare with what I have.ġ0:1 Compressed Size 32-bit: 4.69 MB (does that seem correct?)*ġ0:1 Compressed Size 64-bit: UNK (no longer licensed) If you want, the raw tile is JX367 in the collection I sent you before.

I'll give you the specs on that file below. But I ran a single tile in v10 32-bit for a visual comparison.

#ER MAPPER ECW COMPRESSOR TRIAL#

Our trial v11 64-bit license expired, so I can't give you direct comparisons. It would be interesting to figure exactly what is going on here, and why there are these differences. We have since moved back to 32-bit in order to run these because the results are better. I'm going to try and rerun Somerset this evening on v10 32-bit. Somerset County - 2,339 SID tiles (3,516KB Total tile collection size: 7.81GB Resulting mosaic = 6.68GB at 10:1 compression This may not be of any help but here are some numbers I do have.Ĭalvert County - 1,449 SID tiles (3,516KB Total tile collection size: 4.86GB Resulting mosaic = 4.24GB at 20:1 compression At first I thought that might have done it, however I just did the same process on the 32-bit machine (on a smaller collection of tiles) and gridding first, not gridding had no ill effects. I was compressing them initally 10:1, then mosaicking the compressed groups into one file with no compression.

#ER MAPPER ECW COMPRESSOR 64 BIT#

Now, the only thing I was doing on the 64 bit machine was aggregating the thousands of tiles into larger grids. No interpolation, generate wf, generate prj, make bg void. Well unfortunately I do not have a direct comparison because Somerset (the county I sent you) was only done on the 64-bit machine because I couldn't get it to run on my 32-bit.Īll of the settings I made sure were the same. Our goal is to compress the imagery to 20:1 which will work if the results are what they are in 32-bit, but it definitely won't work at the 64-bit results. Planting striations are lost to a overall fuzzy green, road lines and edges become fuzzy, build edges, etc.Īny ideas on what might be causing this? It's troubling because I want to use my 64-bit machine to make these, yet I cannot get the great compression results I'm after.

However if you look at the 10:1 created in the 64-bit you can see that there is great loss of detail. I've attached screenshots to illustrate.ĮCW 10:1 Compression: created in v11 beta2 32-bitĮCW 10:1 Compression: created in v11 beta2 64-bitĮCW 20:1 Compression: created in v11 beta2 32-bitĪs you can see, the 10:1 (32-bit) ECW looks very good. I'm realizing some interesting, and troubling results when exporting to compressed ECW with GM v11 64-bit.

Er mapper ecw compressor