Avenza Resources Blog

Top Reasons to Create a Free PDF Maps Account

#1 - It's free!

PDF Maps accounts are free for personal use.

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How to Purchase Maps From the Avenza Map Store and Share Them with Multiple Devices

The Avenza Support team commonly gets asked about downloading maps you have previously purchased from the Avenza Map 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 Avenza Map Store. Then we'll discuss how you can download purchased maps on to your other devices.

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Making a Map Without Knowing What the Final Extent or Scale Will Be

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.

 

How to Distinguish Between Adobe Illustrator CC and CC 2014

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.

Improve Mosaic By Resampling Images in Geographic Imager

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.

Defining the Projection or Projecting the Data?

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.

Robinson map

New Image Data Type Available in MAPublisher

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".

Edit Schema with a new data type "Image Data Type

What is the difference between Grid Bounds vs Grid Constraints?

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.

Data Collection: Getting Elevation Information with MAPublisher

Mountain Information with no Elevation Data

Have you ever had a point dataset where you wanted to obtain the elevation information for every point?

[VIDEO] There's an App for That: PDF Maps

A short review about PDF Maps by the There's an App for That team at KSBY.com. (The video will play after the short ad.)

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