diff --git a/.ddev/config.yaml b/.ddev/config.yaml
new file mode 100644
index 0000000..b8b41e9
--- /dev/null
+++ b/.ddev/config.yaml
@@ -0,0 +1,281 @@
+name: autoortho-scenery
+type: php
+docroot: public
+php_version: "8.3"
+webserver_type: nginx-fpm
+xdebug_enabled: false
+additional_hostnames: []
+additional_fqdns: []
+database:
+    type: mariadb
+    version: "10.11"
+use_dns_when_possible: true
+composer_version: "2"
+web_environment: []
+corepack_enable: false
+
+# Key features of DDEV's config.yaml:
+
+# name: <projectname> # Name of the project, automatically provides
+#   http://projectname.ddev.site and https://projectname.ddev.site
+
+# type: <projecttype>  # backdrop, craftcms, django4, drupal, drupal6, drupal7, laravel, magento, magento2, php, python, shopware6, silverstripe, typo3, wordpress
+# See https://ddev.readthedocs.io/en/stable/users/quickstart/ for more
+# information on the different project types
+# "drupal" covers recent Drupal 8+
+
+# docroot: <relative_path> # Relative path to the directory containing index.php.
+
+# php_version: "8.2"  # PHP version to use, "5.6", "7.0", "7.1", "7.2", "7.3", "7.4", "8.0", "8.1", "8.2", "8.3", "8.4"
+
+# You can explicitly specify the webimage but this
+# is not recommended, as the images are often closely tied to DDEV's' behavior,
+# so this can break upgrades.
+
+# webimage: <docker_image>  # nginx/php docker image.
+
+# database:
+#   type: <dbtype> # mysql, mariadb, postgres
+#   version: <version> # database version, like "10.11" or "8.0"
+#   MariaDB versions can be 5.5-10.8, 10.11, and 11.4.
+#   MySQL versions can be 5.5-8.0.
+#   PostgreSQL versions can be 9-17.
+
+# router_http_port: <port>  # Port to be used for http (defaults to global configuration, usually 80)
+# router_https_port: <port> # Port for https (defaults to global configuration, usually 443)
+
+# xdebug_enabled: false  # Set to true to enable Xdebug and "ddev start" or "ddev restart"
+# Note that for most people the commands
+# "ddev xdebug" to enable Xdebug and "ddev xdebug off" to disable it work better,
+# as leaving Xdebug enabled all the time is a big performance hit.
+
+# xhprof_enabled: false  # Set to true to enable Xhprof and "ddev start" or "ddev restart"
+# Note that for most people the commands
+# "ddev xhprof" to enable Xhprof and "ddev xhprof off" to disable it work better,
+# as leaving Xhprof enabled all the time is a big performance hit.
+
+# webserver_type: nginx-fpm, apache-fpm, or nginx-gunicorn
+
+# timezone: Europe/Berlin
+# If timezone is unset, DDEV will attempt to derive it from the host system timezone
+# using the $TZ environment variable or the /etc/localtime symlink.
+# This is the timezone used in the containers and by PHP;
+# it can be set to any valid timezone,
+# see https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
+# For example Europe/Dublin or MST7MDT
+
+# composer_root: <relative_path>
+# Relative path to the Composer root directory from the project root. This is
+# the directory which contains the composer.json and where all Composer related
+# commands are executed.
+
+# composer_version: "2"
+# You can set it to "" or "2" (default) for Composer v2 or "1" for Composer v1
+# to use the latest major version available at the time your container is built.
+# It is also possible to use each other Composer version channel. This includes:
+#   - 2.2 (latest Composer LTS version)
+#   - stable
+#   - preview
+#   - snapshot
+# Alternatively, an explicit Composer version may be specified, for example "2.2.18".
+# To reinstall Composer after the image was built, run "ddev debug rebuild".
+
+# nodejs_version: "20"
+# change from the default system Node.js version to any other version.
+# See https://ddev.readthedocs.io/en/stable/users/configuration/config/#nodejs_version for more information
+# and https://www.npmjs.com/package/n#specifying-nodejs-versions for the full documentation,
+# Note that using of 'ddev nvm' is discouraged because "nodejs_version" is much easier to use,
+# can specify any version, and is more robust than using 'nvm'.
+
+# corepack_enable: false
+# Change to 'true' to 'corepack enable' and gain access to latest versions of yarn/pnpm
+
+# additional_hostnames:
+#  - somename
+#  - someothername
+# would provide http and https URLs for "somename.ddev.site"
+# and "someothername.ddev.site".
+
+# additional_fqdns:
+#  - example.com
+#  - sub1.example.com
+# would provide http and https URLs for "example.com" and "sub1.example.com"
+# Please take care with this because it can cause great confusion.
+
+# upload_dirs: "custom/upload/dir"
+#
+# upload_dirs:
+#   - custom/upload/dir
+#   - ../private
+#
+# would set the destination paths for ddev import-files to <docroot>/custom/upload/dir
+# When Mutagen is enabled this path is bind-mounted so that all the files
+# in the upload_dirs don't have to be synced into Mutagen.
+
+# disable_upload_dirs_warning: false
+# If true, turns off the normal warning that says
+# "You have Mutagen enabled and your 'php' project type doesn't have upload_dirs set"
+
+# ddev_version_constraint: ""
+# Example:
+# ddev_version_constraint: ">= 1.22.4"
+# This will enforce that the running ddev version is within this constraint.
+# See https://github.com/Masterminds/semver#checking-version-constraints for
+# supported constraint formats
+
+# working_dir:
+#   web: /var/www/html
+#   db: /home
+# would set the default working directory for the web and db services.
+# These values specify the destination directory for ddev ssh and the
+# directory in which commands passed into ddev exec are run.
+
+# omit_containers: [db, ddev-ssh-agent]
+# Currently only these containers are supported. Some containers can also be
+# omitted globally in the ~/.ddev/global_config.yaml. Note that if you omit
+# the "db" container, several standard features of DDEV that access the
+# database container will be unusable. In the global configuration it is also
+# possible to omit ddev-router, but not here.
+
+# performance_mode: "global"
+# DDEV offers performance optimization strategies to improve the filesystem
+# performance depending on your host system. Should be configured globally.
+#
+# If set, will override the global config. Possible values are:
+#   - "global":  uses the value from the global config.
+#   - "none":    disables performance optimization for this project.
+#   - "mutagen": enables Mutagen for this project.
+#   - "nfs":     enables NFS for this project.
+#
+# See https://ddev.readthedocs.io/en/stable/users/install/performance/#nfs
+# See https://ddev.readthedocs.io/en/stable/users/install/performance/#mutagen
+
+# fail_on_hook_fail: False
+# Decide whether 'ddev start' should be interrupted by a failing hook
+
+# host_https_port: "59002"
+# The host port binding for https can be explicitly specified. It is
+# dynamic unless otherwise specified.
+# This is not used by most people, most people use the *router* instead
+# of the localhost port.
+
+# host_webserver_port: "59001"
+# The host port binding for the ddev-webserver can be explicitly specified. It is
+# dynamic unless otherwise specified.
+# This is not used by most people, most people use the *router* instead
+# of the localhost port.
+
+# host_db_port: "59002"
+# The host port binding for the ddev-dbserver can be explicitly specified. It is dynamic
+# unless explicitly specified.
+
+# mailpit_http_port: "8025"
+# mailpit_https_port: "8026"
+# The Mailpit ports can be changed from the default 8025 and 8026
+
+# host_mailpit_port: "8025"
+# The mailpit port is not normally bound on the host at all, instead being routed
+# through ddev-router, but it can be bound directly to localhost if specified here.
+
+# webimage_extra_packages: [php7.4-tidy, php-bcmath]
+# Extra Debian packages that are needed in the webimage can be added here
+
+# dbimage_extra_packages: [telnet,netcat]
+# Extra Debian packages that are needed in the dbimage can be added here
+
+# use_dns_when_possible: true
+# If the host has internet access and the domain configured can
+# successfully be looked up, DNS will be used for hostname resolution
+# instead of editing /etc/hosts
+# Defaults to true
+
+# project_tld: ddev.site
+# The top-level domain used for project URLs
+# The default "ddev.site" allows DNS lookup via a wildcard
+# If you prefer you can change this to "ddev.local" to preserve
+# pre-v1.9 behavior.
+
+# ngrok_args: --basic-auth username:pass1234
+# Provide extra flags to the "ngrok http" command, see
+# https://ngrok.com/docs/ngrok-agent/config or run "ngrok http -h"
+
+# disable_settings_management: false
+# If true, DDEV will not create CMS-specific settings files like
+# Drupal's settings.php/settings.ddev.php or TYPO3's additional.php
+# In this case the user must provide all such settings.
+
+# You can inject environment variables into the web container with:
+# web_environment:
+#     - SOMEENV=somevalue
+#     - SOMEOTHERENV=someothervalue
+
+# no_project_mount: false
+# (Experimental) If true, DDEV will not mount the project into the web container;
+# the user is responsible for mounting it manually or via a script.
+# This is to enable experimentation with alternate file mounting strategies.
+# For advanced users only!
+
+# bind_all_interfaces: false
+# If true, host ports will be bound on all network interfaces,
+# not the localhost interface only. This means that ports
+# will be available on the local network if the host firewall
+# allows it.
+
+# default_container_timeout: 120
+# The default time that DDEV waits for all containers to become ready can be increased from
+# the default 120. This helps in importing huge databases, for example.
+
+#web_extra_exposed_ports:
+#- name: nodejs
+#  container_port: 3000
+#  http_port: 2999
+#  https_port: 3000
+#- name: something
+#  container_port: 4000
+#  https_port: 4000
+#  http_port: 3999
+# Allows a set of extra ports to be exposed via ddev-router
+# Fill in all three fields even if you don’t intend to use the https_port!
+# If you don’t add https_port, then it defaults to 0 and ddev-router will fail to start.
+#
+# The port behavior on the ddev-webserver must be arranged separately, for example
+# using web_extra_daemons.
+# For example, with a web app on port 3000 inside the container, this config would
+# expose that web app on https://<project>.ddev.site:9999 and http://<project>.ddev.site:9998
+# web_extra_exposed_ports:
+#  - name: myapp
+#    container_port: 3000
+#    http_port: 9998
+#    https_port: 9999
+
+#web_extra_daemons:
+#- name: "http-1"
+#  command: "/var/www/html/node_modules/.bin/http-server -p 3000"
+#  directory: /var/www/html
+#- name: "http-2"
+#  command: "/var/www/html/node_modules/.bin/http-server /var/www/html/sub -p 3000"
+#  directory: /var/www/html
+
+# override_config: false
+# By default, config.*.yaml files are *merged* into the configuration
+# But this means that some things can't be overridden
+# For example, if you have 'use_dns_when_possible: true'' you can't override it with a merge
+# and you can't erase existing hooks or all environment variables.
+# However, with "override_config: true" in a particular config.*.yaml file,
+# 'use_dns_when_possible: false' can override the existing values, and
+# hooks:
+#   post-start: []
+# or
+# web_environment: []
+# or
+# additional_hostnames: []
+# can have their intended affect. 'override_config' affects only behavior of the
+# config.*.yaml file it exists in.
+
+# Many DDEV commands can be extended to run tasks before or after the
+# DDEV command is executed, for example "post-start", "post-import-db",
+# "pre-composer", "post-composer"
+# See https://ddev.readthedocs.io/en/stable/users/extend/custom-commands/ for more
+# information on the commands that can be extended and the tasks you can define
+# for them. Example:
+#hooks:
diff --git a/public/tile_lists.php b/public/tile_lists.php
new file mode 100644
index 0000000..15e9e7b
--- /dev/null
+++ b/public/tile_lists.php
@@ -0,0 +1,173 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Tile Lists</title>
+  <style>
+      body > div {
+          width: 100%;
+          height: 60vw;
+          display: flex;
+          flex-direction: column;
+          justify-content: space-between;
+      }
+
+      body > div > div {
+          flex-grow: 2;
+          display: flex;
+          flex-direction: row;
+          justify-content: space-between;
+      }
+
+      body > div > div > a {
+          flex-grow: 2;
+          /*border: 1px solid #999;*/
+          font-size: 60%;
+      }
+  </style>
+<body>
+<?php
+$drop = $_GET['drop'] ?? null;
+if ($drop !== null) {
+  $file = "../" . ($_GET['l'] ?? '');
+
+//  echo $file . ': ' . $drop . ' |';
+  $tiles = explode("\n", file_get_contents($file));
+//  echo count($tiles);
+  $tiles = array_filter(
+    $tiles,
+    function($tile) use ($drop) {
+      return $tile !== $drop;
+    }
+  );
+//  echo '#' . count($tiles);
+  file_put_contents($file, implode("\n", $tiles));
+}
+
+$add = $_GET['add'] ?? null;
+if ($add !== null) {
+  $file = "../" . ($_GET['l'] ?? '');
+
+  $tiles = explode("\n", file_get_contents($file));
+  $tiles = [...$tiles, $add];
+  sort($tiles, SORT_NUMERIC);
+  $tiles = array_unique($tiles);
+  file_put_contents($file, implode("\n", $tiles));
+}
+
+
+$files = glob("../*_tile_list");
+
+$tiles = [];
+$tileLists = [];
+foreach ($files as $file) {
+  $fileName = basename($file);
+  if ($fileName == 'test_tile_list') {
+    continue;
+  }
+
+  $tile_list = file_get_contents($file);
+  foreach (explode("\n", $tile_list) as $tile) {
+    $tiles[$tile] = [...($tiles[$tile] ?? []), $fileName];
+    if (!in_array($fileName, $tileLists)) {
+      $tileLists[] = $fileName;
+    }
+  }
+}
+?>
+<legend>
+  <?php
+  echo '<a href="?l=ALL">ALL</a> | ';
+  foreach ($tileLists as $tileList) {
+    echo '<a href="?' . http_build_query(['l' => $tileList]) . '">' . $tileList . '</a> | ';
+  }
+  ?>
+  <button onclick="doDropHrefs()">Drop</button>
+  <a href="?<?= http_build_query(['l' => $_GET['l'] ?? null, 'addMode' => 1]) ?>">ADD</a>
+</legend>
+<div>
+  <?php
+  //    var_dump($tileLists);
+  for ($lat = 90; $lat >= -90; $lat--) {
+    echo '<div>';
+    for ($lon = -180; $lon <= 180; $lon++) {
+      $tile = sprintf('%+03d%+04d', $lat, $lon) . '.dsf';
+
+      $color = '';
+      $link = '';
+      if (isset($tiles[$tile])) {
+        $color = '#999';
+        if (count($tiles[$tile]) > 1) {
+          $color = '#444';
+        }
+      }
+//      if ($_GET['l'] == 'ALL') {
+//        if (isset($tiles[$tile])) {
+//          $color = 'green';
+//          if (count($tiles[$tile]) > 1) {
+//            $color = 'red';
+//          }
+//        }
+      if (in_array($_GET['l'] ?? null, $tiles[$tile] ?? [])) {
+        $color = 'green';
+        if (count($tiles[$tile] ?? []) > 1) {
+          $color = 'red';
+          if ($_GET['addMode'] ?? null) {
+          } else {
+            $link = 'href="?' . http_build_query(['l' => $_GET['l'], 'drop' => $tile]) . '"';
+          }
+        }
+      } else {
+          if (isset($tiles[$tile]) && ($_GET['addMode'] ?? null) && ($_GET['l'] ?? null)) {
+            $link = 'href="?' . http_build_query(['addMode' => 1, 'l' => $_GET['l'] ?? null, 'add' => $tile]) . '"';
+          }
+      }
+
+      echo '
+      <a ' . $link . '
+      style="background: ' . $color . '"
+      >' . '</a>
+    ';
+    }
+    echo '</div>';
+  }
+  ?>
+</div>
+<script>
+  const tiles = document.querySelectorAll('div a');
+  const dropHrefs = [];
+
+  tiles.forEach(tile => {
+    tile.addEventListener('mouseover', (e) => {
+      e.preventDefault()
+      if (e.target.href && e.ctrlKey) {
+        e.preventDefault();
+        dropHrefs.push({el: e.target, href: e.target.href});
+        e.target.removeAttribute('href');
+        e.target.style.background = 'blue';
+      }
+    });
+  });
+
+  function doDropHrefs() {
+    if (dropHrefs.length === 0) {
+      return;
+    }
+
+    const drop = dropHrefs.shift()
+    fetch(drop.href)
+      .then(
+        response => {
+          if (response.ok) {
+            drop.el.style.background = '#999';
+          } else {
+            drop.el.style.background = 'maroon';
+          }
+          
+          doDropHrefs()
+        }
+      )
+  }
+</script>
+
+</body>
+</html>