Thank several of you for your responses. A clarification on what we need:
We would like to hire someone to review our raster data collections of
aerial orthophotography and determine the best method (BigTIFF vs
ImagePyramid vs Mosaic vs Tile Cache) for creating WMS map services. That
person would also perform the necessary raster processing (e.g., GDAL)
tasks and create the services in GeoServer. If necessary, I could do some
of the raster processing myself, although I would be fine if the consultant
did the entire job. We have 12 separate years (spanning 1937 to 2012) of
statewide aerial coverage; the first 4 of which work fine (1937 - 1968) as
a single GeoTIFF/BigTIFF. It's the other years I really need help on.
I am hoping this is a relatively simple project for someone with
experience. I do not have enough experience, or currently the time to
explore all the options, although I do have some money dedicated to this
project. We would be fine using this as a case study for one of the online
wikis/journals or to help with documentation.
If you are interested in the work, please send me an email. Thanks.
Delaware Geological Survey
University of Delaware
On Tue, May 7, 2013 at 1:35 PM, John Callahan <john.callahan@...:
> 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 creating what we hope will be a nice historical reference for our region.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
> 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.Callahan@... if you have any specific questions.
> - John
> John Callahan
> Research Scientist
> Delaware Geological Survey
> University of Delaware