We have 12 different years of aerial orthophotgraphy (from 1937 to 2012)
that covers our state (of Delaware.) We would like to create WMS map
services for each year. They will eventually be displayed on a web mapping
application and available for direct access, such as through desktop GIS,
creating what we hope will be a nice historical reference for our region.
The problem is we need some guidance on an optimum strategy for processing
our data to create these services. Data for each year are in differing
styles. For example, several of our datasets are delivered as 1.7 km x 1.7
km tiles, each tile approx 135 MB (without compression), totaling nearly
300 GB from 2,010 individual tiles. Other years we have as three,
county-wide MrSID files around 1 GB each. And other years follow the USGS
quad tiling structure or have a single, statewide mosaic TIF file. All
data are in DE State Plane meters, ESPG:26957.
Our inventory list of datasets is here: http://demac.udel.edu/tiles/
(click DE Ortho Inventory. We do not plan on serving the 1977 or 2010 data.)
We are looking to pay someone to help devise our strategy to manage our
data and create the services. We would do most of the processing work
(e.g. GDAL) ourselves as long as we know which way to go. Do we use
internally tiled BigTIFF files with external overviews? Do we use the
Image Mosaic or Image Pyramid plugins? Do we use GeoWebCache? Do we
create a TMS tile structure using GDAL2Tiles? We don't know.
If anyone is interested, can they please send me approximate quotes with a
resume and/or references/examples of their work? We can start in the next
few weeks. We have a Windows (I know, I know) server setup, with what
should be enough RAM and storage. As well, we have the latest/recent
versions of GeoServer, Apache, PHP, Postgres, and OSGeo4W installed.
This project will be managed by DEMAC <http://demac.udel.edu/>. Please
email me and tina.calla...@udel.edu if you have any specific questions.
Thanks.
- John
John Callahan
Research Scientist
Delaware Geological Survey
University of Delaware
http://www.dgs.udel.edu
john.calla...@udel.edu
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