You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libgeos-c1 : Depends: libgeos++-dev (>= 3.3.1) but it is not installed
E: Unmet dependencies. Try using -f.



XXX@XXX:~/Desktop$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  libgeos++-dev
Suggested packages:
  libgdal-doc
The following NEW packages will be installed:
  libgeos++-dev
0 upgraded, 1 newly installed, 0 to remove and 6 not upgraded.
1 not fully installed or removed.
Need to get 0 B/1.587 kB of archives.
After this operation, 6.812 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
(Reading database ... 414945 files and directories currently installed.)
Unpacking libgeos++-dev (from .../libgeos++-dev_3.3.1-4oneiric1_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/libgeos++-dev_3.3.1-4oneiric1_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/libgeos-3.3.1.so', which is also in package libgeos-3.3.1 3.3.1-4oneiric1
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/libgeos++-dev_3.3.1-4oneiric1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)