Read shapefile metadata

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Read a shapefile and display its metadata.

Image of read shapefile metadata

Use case

You can display information about the shapefile your user is viewing, like tags, credits, and summary.

How to use the sample

The shapefile's metadata will be displayed when you open the sample.

How it works

  1. Call ShapefileFeatureTable.OpenAsync("path_to_shapefile") to create the ShapefileFeatureTable.
  2. Get the ShapefileInfo from the feature table's Info property.
  3. Get the image from fileInfo.Thumbnail and display it.
  4. Display the Summary, Credits, and Tags properties from the shapefile info.

Relevant API

  • ShapefileFeatureTable
  • ShapefileFeatureTable.Info
  • ShapefileFeatureTable.OpenAsync
  • ShapefileInfo
  • ShapefileInfo.Credits
  • ShapefileInfo.Summary
  • ShapefileInfo.Tags
  • ShapefileInfo.Thumbnail

Offline data

Aurora Colorado Shapefiles is available as an item hosted on ArcGIS Online].

About the data

This sample uses a shapefile showing bike trails in Aurora, CO. The Aurora Colorado Shapefiles are available as an item on ArcGIS Online.

Tags

credits, description, metadata, package, shape file, shapefile, summary, symbology, tags, visualization

Sample Code

MetadataDisplayViewController.csReadShapefileMetadata.cs
                                                                                         
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using Esri.ArcGISRuntime.Data;
using Esri.ArcGISRuntime.UI;
using UIKit;

namespace ArcGISRuntime.Samples.ReadShapefileMetadata
{
    public partial class MetadataDisplayViewController : UIViewController
    {
        // Hold a reference to the shapefile metadata.
        private readonly ShapefileInfo _metadata;

        public MetadataDisplayViewController(ShapefileInfo metadata) : base("MetadataDisplayViewController", null)
        {
            _metadata = metadata;
        }

        public override async void LoadView()
        {
            View = new UIView { BackgroundColor = ApplicationTheme.BackgroundColor };

            UIImageView imageView = new UIImageView();
            imageView.TranslatesAutoresizingMaskIntoConstraints = false;
            imageView.ContentMode = UIViewContentMode.ScaleAspectFit;

            UIStackView stackLayout = new UIStackView(new[]
            {
                imageView,
                getContentLabel(_metadata.Summary),
                getHeaderLabel("Description"),
                getContentLabel(_metadata.Description),
                getHeaderLabel("Credits"),
                getContentLabel(_metadata.Credits),
                getHeaderLabel("Tags"),
                getContentLabel(string.Join(", ", _metadata.Tags)),
                new UIView()
            });
            stackLayout.TranslatesAutoresizingMaskIntoConstraints = false;
            stackLayout.Axis = UILayoutConstraintAxis.Vertical;
            stackLayout.Spacing = 8;
            stackLayout.LayoutMarginsRelativeArrangement = true;
            stackLayout.LayoutMargins = new UIEdgeInsets(8, 8, 8, 8);

            UIScrollView scrollView = new UIScrollView();
            scrollView.TranslatesAutoresizingMaskIntoConstraints = false;

            // Add the views.
            View.AddSubview(scrollView);
            scrollView.AddSubview(stackLayout);

            // Lay out the views.
            NSLayoutConstraint.ActivateConstraints(new[]
            {
                scrollView.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor),
                scrollView.BottomAnchor.ConstraintEqualTo(View.BottomAnchor),
                scrollView.LeftAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.LeftAnchor),
                scrollView.RightAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.RightAnchor),
                stackLayout.TopAnchor.ConstraintEqualTo(scrollView.TopAnchor),
                stackLayout.BottomAnchor.ConstraintEqualTo(scrollView.BottomAnchor),
                stackLayout.LeftAnchor.ConstraintEqualTo(scrollView.LeftAnchor),
                stackLayout.RightAnchor.ConstraintEqualTo(scrollView.RightAnchor),
                // Prevent horizontal scrolling
                stackLayout.WidthAnchor.ConstraintEqualTo(scrollView.WidthAnchor)
            });

            // Load the image.
            imageView.Image = await _metadata.Thumbnail.ToImageSourceAsync();
        }

        private UILabel getHeaderLabel(string text)
        {
            var label = new UILabel();
            label.Text = text;
            label.TextAlignment = UITextAlignment.Center;
            label.Font = UIFont.BoldSystemFontOfSize(14);
            label.TranslatesAutoresizingMaskIntoConstraints = false;
            return label;
        }

        private UILabel getContentLabel(string content)
        {
            var label = new UILabel();
            label.Text = content;
            label.LineBreakMode = UILineBreakMode.WordWrap;
            label.TranslatesAutoresizingMaskIntoConstraints = false;
            label.Lines = 0;
            return label;
        }
    }
}

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