1/30/2024 0 Comments For ios download OverlayBefore we can use gdalinfo though, we need to get in the directory of our image/project. To do this, we are going to use the gdalinfo command. I will be giving the Mac commands below, but I assume that they are similar on a PC.īecause we are referencing each corner pixel of our overlay image to a coordinate, we need to know how many pixels wide and tall our image is. If you’re on a Mac, I would suggest using Kyng Chaos. Take a minute and go download and install GDAL. Thankfully, there is a tool called GDAL that will take our overlay image and cut it up into all of the tiles that we need. These are square images that only load if they are viewable in the zoom level that you are looking at. MapKit, and Google Maps, works by using map tiles. Selecting “directions from here” will put the coordinates for the pin in the search form. Right click on each pin in the left toolbar, and select “Directions from here”.Be sure to zoom in as close as possible, and get the pin as close to the corner as possible Drop a pin on each corner of your image.Stretch/move your image so that it lines up.Create a copy of your overlay image, this time with a red border.The best way I found to match the corner pixels of the image to coordinates is to: I exported my image as a PNG-24 since I had large amounts of blank area on the image. When you have an overlay image that you are happy with, hide the background, and export your image. Start building your overlay on top of this background image. You can tweak these image settings to your project. With a smaller image size or lower resolution I noticed that I had very jagged edges. I used 300 PPI and set my image size to about 3,000 px by 4,000 px. This gave me a background image that I could put into Photoshop and then build upon. I used a plugin for Google Chrome browser that took a screenshot of the entire page.I changed the size of the iframe to about 4,000 px by 4,000 px.Created a quick HTML document with the embed code in it. Grabbed the embed code for the location I wanted.I knew from the beginning that I would need some graphic of Midwestern State University to serve as a foundation for me to build my overlay image. What follows is the process used to create and integrate custom overlays into an existing iOS app. One of the issues I ran into was a lack of good information on how to integrate custom overlays into an existing iOS project. Because I had a lot of detail I wanted to show on our map – Faculty/Commuter/Resident Parking Lots, labels for different buildings, key points of interest on campus – I began to look into using custom overlays, a large image laid of top of the Google map tiles. I am particularly responsible for developing the map that we are going to use for the app. I am part of a team developing an iPhone app for Midwestern State University.
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