My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
SPDSS_Task90-1_ImageBaseMap_20040209
CWCB
>
Decision Support Systems
>
DayForward
>
SPDSS_Task90-1_ImageBaseMap_20040209
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
4/17/2013 10:02:51 AM
Creation date
6/5/2008 10:05:49 AM
Metadata
Fields
Template:
Decision Support Systems
Title
SPDSS Task 90.1 - Obtain and Process Data (Image Base Map)
Description
This memorandum summarizes the procedures and results of the Image Base Map prepared under Task 90--Image Base Map and Irrigated Field Boundaries, Subtask 90.1—Obtain and Process Data.
Decision Support - Doc Type
Task Memorandum
Date
2/9/2004
DSS Category
GIS
DSS
South Platte
Basin
South Platte
Contract/PO #
C153960
Grant Type
Non-Reimbursable
Bill Number
SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
Prepared By
Riverside Technology inc
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
8
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
SPDSS Memorandum <br />To: Ray Alvarado, Ray Bennett <br />From: Riverside Technology, inc., Timothy Martin and Nils Babel <br />Subject: SPDSS Spatial System Integration Component, Subtask 90.1 -Obtain and Process Data <br />(Image Base Map) <br />Date: 9 February 2004 <br />1. Introduction <br />This memorandum summarizes the procedures and results of the Image Base Map prepared under Task <br />90--Image Base Map and Irrigated Field Boundaries, Subtask 90.1-Obtain and Process Data. These <br />activities are described in RTi's Scope of Work for SPDSS Phase 1 and 2 Spatial System Integration <br />Component. As described in the Scope of Work (page 4) the objective of Task 90 includes the following: <br />Develop a digital, seamless image base map for the entire South Platte and North Platte River <br />basins... . <br />The deliverable for this Subtask 90.1 is described in the Scope of Work (page 5), Deliverable 90.1. This <br />memo accompanies a set of work products including: <br />• The image base map in MrSID compressed format; <br />• An image boundary shapefile with the boundaries and sources of the various imagery used to <br />produce the base map; <br />• A the boundary shapefile showing the extent of the 23 tiles making up the seamless database; <br />• A series of 62 hardcopy maps at a scale of 1:40,000 for the entire study area. <br />The above products and this memo were initially provided to the State in draft on October 30, 2003. The <br />products have been revised as final deliverables, incorporating comments and suggestions by the State. <br />A portion of the data within the seamless orthoimage database was provided by Weld County per <br />agreement with CWCB, dated 5 March 2003. This agreement specifies that the Weld County data cannot <br />be distributed without written permission of the County. Subsequently, Weld County gave their approval <br />to distribute these data to other state agencies in an email dated 20 November 2003. To accommodate all <br />potential users, we have prepared two versions of the database. The primary version contains the Weld <br />County data and is not distributable outside of state agencies without written permission from Weld <br />County. The second database version is fully distributable and does not contain any of the Weld County <br />proprietary data. In its place, as described in further detail below, we have inserted older USGS data <br />where available and for some areas, typically outside of the irrigated regions, there is no data. <br />2. Approaches and Method <br />The black and white, digitally compressed, seamless image base map was created using USGS Digital <br />Orthophoto Quarter Quadrangles (DOQQs), orthophotography from Weld County, Indian Remote <br />Sensing satellite imagery, and Landsat panchromatic imagery. Most of the image base map is made up of <br />USGS DOQQs with a horizontal ground resolution of lm by lm. An example of these data is shown in <br />Figure 1. DOQQ imagery from the USGS was chosen for its high resolution and for its spatial accuracy, <br />which provide a superior base for mapping irrigated parcels and related characteristics. <br />In addition to the 1418 USGS DOQQs acquired for this project, CWCB shared the cost with USGS for <br />updating another 340 DOQQs. For these areas, the previously available USGS digital orthophotos from <br />Page 1 of 8 ~l~lverslde Technology, lnc. <br />4N:rfer Resources Fnyrneerrng urnd Curzsurtrnq <br />
The URL can be used to link to this page
Your browser does not support the video tag.