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mapping application and available for direct access, such as through desktop GIS, creating what we hope will be a nice historical reference for our region.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. Please email me and Tina.Callahan@anonymised.com if you have any specific questions. Thanks.
John Callahan
Research Scientist
Delaware Geological Survey
University of Delaware
http://www.dgs.udel.edu
john.callahan@anonymised.com
Hi John,
I guess maybe some places got back to you off-list, but you may find this document useful - the GeoSolutions folks created it:
http://demo.geo-solutions.it/share/foss4g2011/gs_steroids_sgiannec_foss4g2011.pdf
It has quite a bit of information about images and what thresholds etc there should be when choosing between the different options. It was very helpful for me, though we have much smaller datasets (just went with BigTiffs).
Jonathan
On 7 May 2013 18:35, John Callahan <john.callahan@anonymised.com> wrote:
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. Please email me and Tina.Callahan@anonymised.com if you have any specific questions. Thanks.
John Callahan
Research Scientist
Delaware Geological Survey
University of Delaware
http://www.dgs.udel.edu
john.callahan@anonymised.com
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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.
···
John Callahan
Research Scientist
Delaware Geological Survey
University of Delaware
http://www.dgs.udel.edu
john.callahan@anonymised.com
On Tue, May 7, 2013 at 1:35 PM, John Callahan <john.callahan@anonymised.com> wrote:
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. Please email me and Tina.Callahan@anonymised.com if you have any specific questions. Thanks.
John Callahan
Research Scientist
Delaware Geological Survey
University of Delaware
http://www.dgs.udel.edu
john.callahan@anonymised.com