Avenza Resources Blog
The Avenza Support team commonly gets asked about downloading maps you have previously purchased from the PDF Maps Store onto other devices. We'll be using an Apple iPad and a Samsung Galaxy Tab to demonstrate this process. As these are both tablets they will have a slightly different interface than their smartphone counterparts, however the workflow is the same so do not panic if you are using a phone or another device and things look a little different.
The first section is a run-through of the map purchase process on the PDF Maps Store. Then we'll discuss how you can download purchased maps on to your other devices.
Ever have the problem that you want to make a map and you are waiting on the final extent or scale, but you want to get started adding data and working on the layout? Here are a couple of tips to make your life easier.
Adobe Illustrator Creative Cloud 2014 was recently released. Unfortunately the naming of the latest version has caused a little confusion among users because in many places (including Adobe.com), Adobe has simply called it "Adobe Illustrator CC" without the "2014".
To make it a bit more confusing, in the Creative Cloud App, the newest version of Illustrator is distinguished by the designation "(2014)". It is actually a completely separate install, not simply an update of the existing Illustrator CC. The icon used is also the exact same, so there is further confusion because in the past, the icon would change colour or design ever so slightly.
The Mosaic function in Geographic Imager merges multiple georeferenced images together to create a single composite georeferenced image. Though the goal of the mosaic is to create a single and seamless composite image, combining images with the Mosaic tool will often result in a slight shift of the imagery due to differences in the original pixel registration grid. This means that even when images are in the same coordinate system with the same spatial resolution, error can still be introduced because of a difference in the pixel alignment. Due to this, mosaicking processes in general tend to produce results that may be very close, but not exact. With this in mind, the results of your mosaic may be improved by resampling your images beforehand to the smallest unit of the resolution.
As an example, let's say we have an image where the pixel size is 2.00 metres. When plotting the X coordinates of every pixel in this image (using the top left corner of the pixel), the X coordinate value will be incremented by the number/distance of the pixel size. For example, if the X coordinate values were to start at 111.00, then the next pixel would be 113.00, 115.00, 117.00, and so on. It's important to note that these coordinate values are discrete, which means that the values could not be 113.22 or 115.77 because the origin of the coordinate in this case starts at 111.00 metres.
Have you ever imported data that doesn't quite line up how you'd expect? It may be that you've fallen victim to a common workflow error when importing GIS data. Some file types such as CSV can be used for GIS data but don't contain coordinate system information. When you are importing data from this format, you first have to define the correct coordinate system.
In this example, we're going to look at the common mistakes people make and how to avoid them. We'll start with a world map in the Robinson projection.
Do you have pictures and images you want to insert as an attribute in MAPublisher?
MAPublisher 9.4 introduces a new data type called Image. To work with the Image data type, you'll have to take a look in the MAP Attributes panel. The Image data type can be used in the same way as the other data types in the MAP Attributes panel. Use the Edit Schema dialog box to edit or create the Image data type as an attribute.
For this example, we have a point layer called "Point of Interests". Let's create a new attribute column with Image data type called "Picture".
In MAPublisher, the grid bound is the visual extent of the grid or graticule. The grid constraint is the geographic extent of the grid or graticule. It may be a little confusing since both grid bound and grid constraint are defined by coordinate values. In terms of hierarchy, think of the grid bound as the overall container of the grid and the constraint as being contained within the bound.
Have you ever had a point dataset where you wanted to obtain the elevation information for every point?
It's exciting when a new version of MAPublisher is released! However, after upgrading you might come across a license status indicated as "License version too low" in the MAPublisher Welcome screen (above) or the License Management dialog box (below). Why? This is most likely due to not obtaining a license for the latest version of MAPublisher yet.
Here's a short and simple video on how to export an ArcGIS map for use in the PDF Maps app. It was put together by the Smith College Spatial Analysis Lab. It uses a live USGS topo basemap streaming from Esri and the geospatial PDF export feature of ArcGIS.