Posts Tagged ‘TidelandsMapbook2007 map service’

Introducing the 2009AerialsFourInch Service

May 29, 2009

Aerials are an integral part of any well rounded Geographic Information System. Aerials can be used as a great base to provide a context for other data, as part of a quality control effort, or as the source to create new data.

Our new 2009 aerials were flown between 11:20AM and 12:30PM on April 17th, 2009. They are 4 inch resolution meaning each pixel correlates to 4 inches by 4 inches (16 square inches) on the ground. Our new aerials are the highest quality I have ever worked with. They are on-par with the best aerials available today. Below is a table comparing some of the variables between the 3 main aerials we use here at the Port.

Aerial Service: I3_Imagery Prime_World_2D 2005AerialsHalfFoot 2009AerialsFourInch
Source: ArcGIS Online Port Port
Date Taken: 3/15/2008 in Port Area 2005 4/17/2009
Coverage: Worldwide 52.5 Sq. Miles covering Port Tidelands 48.7 Sq. Miles covering Port Tidelands
Resolution: .3 Meters (≈1 Foot) in Port Area Half Foot Four Inch
Ground Pixel Size: 12 x 12 = 144 Sq Inches 6 x 6 = 36 Sq Inches 4 x 4 = 16 Sq Inches

Below are 2 images showing measurements of one side of each pixel.

2005 Pixel Measurement

2005 Pixel Measurement

2009 Pixel Measurement

2009 Pixel Measurement

This is all great, but how does this correlate to the real world? Below are the 3 images of the Administration Building Parking lot. As you know the parking lot was recently repaved and reorganized.

2003 Parking Lot

March 2008 .3 Meter Resolution

2005 Parking Lot

2005 Half Foot Resolution

2009 Parking Lot

April 2009 Four Inch Resolution

Along with our parking lot there have been other changes on or around the Port tidelands since 2005, including the new Hilton between the Convention Center and Tenth Avenue Marine Terminal.

Left 2005 - Right 2009

Left 2005 - Right 2009

We have set up a web application where Port employees can examine the new aerial photos. You can get to this web application by clicking on the 2009 Aerials button at the PortGIS Resource Center. They are much larger images and therefore take a second or two more to render on your screen. Feel free to turn on and off layers in the “Map Contents” area. We hope to include them in the other PortGIS applications shortly.

CoolOldMap Zen

Using Google Streetview within the PortGIS Explorer Web Application

May 7, 2009

We have all used Google Maps and Google Earth with amazement. Google has done an incredible job of creating engaging and easy-to-use geography visualization tools. Streetview, a feature of Google Maps and Google Earth,  provides a 360° horizontal and 290° vertical panoramic views from a row of positions along streets throughout the world. The Streetview images were collected by a camera mounted on a car or truck; therefore, the images are limited to streets. Below VS (See Docs: 315612) shows us how to use Streetview from within our PortGIS Explorer Web Application.

Data collection is the hardest part of any GIS. Google has collected an incredible amount of ground level information as geospatially referenced images. At the Port, this tool can be used to identify an unfamiliar area or be used as part of QAQC process, but the real functionality comes across when we combine Streetview images and our Port data, such as the TidelandsMapbook2007. For example, with this tool in their arsenal our Land Use Planning Department can explore areas before construction or demolition takes place. Without switching to another system, they could also research adjacent tenants, their frontage, and when their lease agreements expire.

We also wrote a blog post on how to use Streetview from within the Harbor Police Desktop Application based on ArcGIS Explorer. We want to thank ESRI, and the tool’s author, for making it available to the public through ESRI’s .Net ADF Code Gallery. See the links below to learn more about these topics

Streetview in PortGIS Harbor Police desktop Application
https://posdgis.wordpress.com/2008/12/02/the-streetviewer-custom-task/

More information about implementing this tool:
http://resources.esri.com/arcgisserver/adf/dotnet/index.cfm?fa=codeGalleryDetails&scriptID=15788

GoogleStreetViewWeddingProposal Zen

The PortGIS (Projects) Web Application and Mayor Sanders’ Airport Plan

March 3, 2009

At the Port of San Diego we manage many properties which are under development. Reports and general information about the more substantial projects are prominently displayed on our external homepage, under the heading “Current Development Projects.” Many of these reports include maps which we might want to compare to existing infrastructure for a wide range of reasons. The PortGIS (Projects) web application intends to give Port employees the ability to compare plans for developments which effect Port properties.

In 2003, San Diego County Regional Airport Authority split from The Port of San Diego, but we often have overlapping interests an concerns. Over the years there has been a lot of debate about revamping Lindbergh Field or moving the airport to another location. On February 12, 2009, the Ad Hoc Airport Regional Policy Committee, chaired by San Diego Mayor Jerry Sanders, released an Executive Summary (docs #354064) outlining their plan for Lindbergh Field. They also released an impressive video simulation. Click the Play button below to hear a KPBS story about the release of this document.

On page 11 of the Executive Summary is a Map titled “Recommended Development Plan.” In the video below I explain how to explore this map in relation to our high resolution aerial photography and our Port interests as represented in the 2007 Tidelands Mapbook.

AreYouReadyForTheFuture Zen

Measure tool in the PortGIS (Beta) Web Application

January 21, 2009

Below is a quick video on the measure tool in our PortGIS Web Application.

We use the infield at Petco Park to show the tools accuracy, but the real power is combining this tool with Port data, specifically the TidelandsMapbook2007 service. The system is set up to answer questions such as; How far is it from the U.S. Pierhead Line from to the parcel leased to the Maritime Museum Association of San Diego?
webappmeasure

Lastly, we would like to welcome Vice Admiral Charles Wurster to our Port family. Admiral Wuster was named the Port of San Diego’s new president and chief executive officer. To see the official Port of San Diego Press Release click here.

AwesomeObamaInaugurationInGoogleEarth Zen

The PortGIS (Beta) Web Application

January 4, 2009

Below is a quick introductory video showing how to access and use our internet browser based GIS web application. We created this product to give all Port employees access to our in-house GIS services: high resolution imagery (Aerials2005HalfFoot) and the Tidelands Mapbook (TidelandsMapbook2007). Every computer that has access to the internet has the hardware to use this web page. Unfortunately, this page requires Internet Explorer 7 (IE7). The browser installed on most machines at the Port is Internet Explorer 6 (IE6). You can access this webpage in IE6, but it doesn’t function quite as well. We are in the process of upgrading everyone to IE7, primarily to support the upcoming SAP upgrade. The video below was recorded using IE7. To check which version of Internet Explorer you are using: Open Internet Explorer and goto Help>About Internet Explorer. You can also access this webpage with newer versions of other browsers such as Mozilla Firefox, Opera, or Google Chrome.

WhatMalcolmIsListeningTo Zen

ArcGIS 4 AutoCAD and our Port GIS Services

December 26, 2008

ArcGIS 4 AutoCAD is a free tool which allows AutoCAD users to view ArcGIS Services within AutoCAD. This software creates a bridge between the GIS world and the CAD world. AutoCAD users are drawn to this tool because it gives them a window into GIS data, while still allowing them to work in the familiar AutoCAD environment. As a GIS professional, I think it is useful because it will lead CAD users to implement GIS spatial standards (coordinate system, projection and scale) without much effort. The short-term selling point for this product is that it is easier to access our in-house aerials using ArcGIS for AutoCAD than the current process. Below is a video showing how to connect to our in-house GIS services. I am not sure why my cursor is shown as a timer icon- please ignore.

I reviewed ArcGIS for AutoCAD a few months back. Since then ESRI has released the new version (build 110) which is used in the video. It seems much more stable and we are now getting real functionality we can integrate into our daily workflow.

The current release of ArcGIS for AutoCAD makes great strides in bringing GIS data into AutoCAD. The next release will streamline the process of creating GIS data within AutoCAD. We will update this blog as new functionality becomes available. If you would like to learn more about this I suggest you also read Don Kuehne’s GIS CAD Interoperability blog at http://giscadblog.blogspot.com/. We certainly will.

Our AutoCAD users manage much of our spatial data. For example; a storm drain is moved based on new construction. Not only will these changes effect Engineering data. These changes will also be reflected throughout the rest of the system. Environmental Services and General Services seem most likely to utilize this data. How does your department utilize data produced (or owned) by AutoCAD users? Would it be useful for this data to be displayed in an interactive web-based map?

ArcGIS for AutoCAD and the 2007 Tidelands Map Book Service

September 8, 2008

FROM ESRI:
ArcGIS for AutoCAD is a simple and easy-to-use tool that gives AutoCAD users access to GIS information and the results of GIS analysis. This free, downloadable application provides access to ArcGIS Server map services and allows you to view and query GIS data from within the AutoCAD environment without transforming your CAD drawings or converting GIS data. As an AutoCAD user, you can work directly with ArcGIS map services to add full GIS context to your AutoCAD session.”

How does this relate to our work here at the port? ArcGIS Server produces services which can be consumed through software (ArcGIS Explorer) and web based applications (web sites with mapping applications). Adding AutoCAD to the ways we can view GIS data is a tremendous leap towards interoperability between GIS and the engineers, surveyers and architects. It will allow our AutoCAD users to view their maps in spatial relation to other GIS data, get data ready to submit to become part of a service, and ultimately allow the engineers to directly edit the service with their AutoCAD data.

This is a “to begin with the end in mind” type of approach. We are a long, long ways away from this actually being a part of our regular workflow. I’d like to explain the nitty-gritty of why this isn’t applicable today. The 2007 Tidlands Map Book service basically displays 2 scales with different information correlating directly to pages II to XII (high altitude) and pages 7 to 247 (low altitude). Below are 2 images of each scale with the Map Book service under a dwg drawing CS’s (Composite surveyed improvements map 03-14-07.dwg) sent me a while ago. Each of these images took over ten minutes to redraw and each time we pan/zoom it takes another 10 minutes.

High Altitude

High Altitude

Low Altitude

Low Altitude

Currently this is not a product which can be easily used in our workflow. This extension for AutoCAD is on the bleeding edge of technology within the AutoCAD GIS interoperability interface. As the software develops and users figure out tricks to make the drawing display faster, we will be able to further integrate this technology.

If you are interested in exploring this on your computer I’d be happy to email you instructions to install ArcGIS for AutoCAD and point to our Tidelands Map Book service.

And now a moment of GIS Zen:
http://www.gearthblog.com/blog/archives/2008/07/radiohead_in_google_earth.html