At the same time as the applet was in active use, we built (credit for the good parts goes to Joe Sirott) a server-side map that required two clicks to mark a rectangle. Joe's implementation had a nice Active X interactive selection, but again we could not use it on a enough browsers to deploy it. Joe has since built other nice map widgets. I built the "two-click" version. It worked. On all browsers, but as one user put it so eloquently: "It's not draggable, dude".
Next up was a long experiment with Google Maps. I built a widget that allowed click, hold and drag drawing of rectangles, horizontal and vertical lines using markers on the corners and mid-points. It worked. Sort of. I could get it to work fine, but I was slow and patient. When users used it the response was so sluggish they the were immediately frustrated. Another killer was the projection. We deal mostly in global data on a rectangular equal-area projection. The Google maps modified Mercator looked terrible on the global view and the selection scaling when dragging a rectangle above 60 north was dramatic and disconcerting.
Enter OpenLayers, the GWT-OpenLayers project and a client that said rightly that the Google Maps implementation was s!@$. I built yet another map widget. I think it works well. Editing the selection is not as slick as was with the Java applet and the strict modal interface is not ideal, but I haven't heard of any browser compatibility issues. And eliminating those was the goal all along.
No doubt this would be more interesting (slightly less boring?) if I had links to all the previous map implementations, but it seems like too much to figure out how to find or deploy stable examples of each.
Nice post,i found lot of information regarding gis. I updated my knowledge with this blog.it can help me to crack GIS jobs in Hyderabad.ReplyDelete
Great Article android based projectsReplyDelete
Java Training in Chennai
Project Center in Chennai
Java Training in Chennai
projects for cse
The Angular Training covers a wide range of topics including Components, Angular Directives, Angular Services, Pipes, security fundamentals, Routing, and Angular programmability. The new Angular TRaining will lay the foundation you need to specialise in Single Page Application developer. Angular Training
랜딩관은 최저가 112,500 원부터 예약을 할 수 있는데 이 가격으로 메리어트관을 업그레이드 받을 수 있는 흔치 않은 기회이다. 대부분의 경우 파라오카지노온라인 카지노는 게임을 할 때마다 일정한 수의 무료 스핀을 제공합니다. 이것이이 카지노의 가장 기본적인 포인트이지만 많은 사람들이 이것을 매력적이라고 생각합니다. 이를 통해 하룻밤에 모두 지출하지 않고도 자금을 쌓을 수 있습니다. 고객님께 일어날 수 있는 모든 상황을 문의 받는 즉시 신속하게 처리할 수 있도록 항시 대기하고 있습니다. 24시간 라이브 바카라사이트 채팅은 여러분과 BUMP가 소통할 수 있는 가장 신속한 수단입니다.ReplyDelete