diff --git a/database.cpp b/database.cpp
index 968a2e6..28529bf 100644
--- a/database.cpp
+++ b/database.cpp
@@ -22,16 +22,32 @@ bool Database::init()
 
     if(m_database.isValid())
     {
-        m_database.setDatabaseName(dir.absoluteFilePath("database.db"));
+        m_database.setDatabaseName(dir.absoluteFilePath("database2.db"));
         if(m_database.open())
         {
             m_database.exec("PRAGMA foreign_keys = ON");
-            m_database.exec("CREATE TABLE IF NOT EXISTS files (id INTEGER PRIMARY KEY AUTOINCREMENT, file VARCHAR(255) UNIQUE)");
-            m_database.exec("CREATE TABLE IF NOT EXISTS fits_files (id INTEGER PRIMARY KEY AUTOINCREMENT, file VARCHAR(255) UNIQUE, mtime DATETIME)");
-            m_database.exec("CREATE TABLE IF NOT EXISTS fits_headers (id INTEGER PRIMARY KEY AUTOINCREMENT, id_file INTEGER,"
-                            "key VARCHAR(81), value VARCHAR(81), comment VARCHAR(81), FOREIGN KEY(id_file) REFERENCES fits_files(id) ON DELETE CASCADE)");
-            m_database.exec("CREATE INDEX IF NOT EXISTS key_value ON fits_headers(key, value)");
-            m_database.exec("CREATE INDEX IF NOT EXISTS id_file ON fits_headers(id_file)");
+            int version = checkVersion();
+            if(version == 0)
+            {
+                m_database.exec("PRAGMA user_version = 1");
+                m_database.exec("CREATE TABLE IF NOT EXISTS files (id INTEGER PRIMARY KEY AUTOINCREMENT, file VARCHAR(255) UNIQUE)");
+                m_database.exec("CREATE TABLE IF NOT EXISTS fits_files (id INTEGER PRIMARY KEY AUTOINCREMENT, file VARCHAR(255) UNIQUE, mtime DATETIME,"
+                                " minRa REAL, maxRa REAL, minDec REAL, maxDec REAL)");
+                m_database.exec("CREATE TABLE IF NOT EXISTS fits_headers (id INTEGER PRIMARY KEY AUTOINCREMENT, id_file INTEGER,"
+                                "key VARCHAR(81), value VARCHAR(81), comment VARCHAR(81), FOREIGN KEY(id_file) REFERENCES fits_files(id) ON DELETE CASCADE)");
+                m_database.exec("CREATE INDEX IF NOT EXISTS key_value ON fits_headers(key, value)");
+                m_database.exec("CREATE INDEX IF NOT EXISTS id_file ON fits_headers(id_file)");
+                m_database.exec("CREATE INDEX IF NOT EXISTS minRa_idx ON fits_files(minRa)");
+                m_database.exec("CREATE INDEX IF NOT EXISTS maxRa_idx ON fits_files(maxRa)");
+                m_database.exec("CREATE INDEX IF NOT EXISTS minDec_idx ON fits_files(minDec)");
+                m_database.exec("CREATE INDEX IF NOT EXISTS maxDec_idx ON fits_files(maxDec)");
+            }
+            else if(version > 1)
+            {
+                qDebug() << "Database version is too new";
+                return false;
+            }
+
             QSqlError error = m_database.lastError();
 
             if(error.type() == QSqlError::NoError)
@@ -45,6 +61,8 @@ bool Database::init()
 
                 m_insertFile = QSqlQuery(m_database);
                 m_insertFile.prepare("INSERT INTO fits_files (file, mtime) VALUES (?, ?)");
+                m_insertFileWcs = QSqlQuery(m_database);
+                m_insertFileWcs.prepare("INSERT INTO fits_files (file, mtime, minRa, maxRa, minDec, maxDec) VALUES (?, ?, ?, ?, ?, ?)");
                 m_insertFitsHeader = QSqlQuery(m_database);
                 m_insertFitsHeader.prepare("INSERT INTO fits_headers (id_file, key, value, comment) VALUES (?, ?, ?, ?)");
                 m_checkFile = QSqlQuery(m_database);
@@ -55,7 +73,6 @@ bool Database::init()
                 m_deleteFile.prepare("DELETE FROM fits_files WHERE id=?");
                 return true;
             }
-
             qDebug() << error.text();
         }
     }
@@ -129,6 +146,15 @@ bool Database::checkError(QSqlQuery &query)
     }
 }
 
+int Database::checkVersion()
+{
+    QSqlDatabase db = QSqlDatabase::database();
+    QSqlQuery query = db.exec("PRAGMA user_version");
+    if(query.next())
+        return query.value(0).toInt();
+    return -1;
+}
+
 static QStringList nameFilters = {"*.fit", "*.fits", "*.xisf"};
 
 static int countFiles(const QDir &dir, int count = 0)
@@ -242,14 +268,36 @@ bool Database::indexFile(const QFileInfo &file)
     qlonglong last_id = -1;
     if(ok)
     {
-        m_insertFile.bindValue(0, filePath);
-        m_insertFile.bindValue(1, mtime);
-        if(!m_insertFile.exec())
+        if(info.wcs)
         {
-            qDebug() << m_insertFile.lastError();
-            return false;
+            double minRa, maxRa, minDec, maxDec;
+            info.wcs->calculateBounds(minRa, maxRa, minDec, maxDec);
+            qDebug() << "bounds" << minRa << maxRa << minDec << maxDec;
+            m_insertFileWcs.bindValue(0, filePath);
+            m_insertFileWcs.bindValue(1, mtime);
+            m_insertFileWcs.bindValue(2, minRa);
+            m_insertFileWcs.bindValue(3, maxRa);
+            m_insertFileWcs.bindValue(4, minDec);
+            m_insertFileWcs.bindValue(5, maxDec);
+            if(!m_insertFileWcs.exec())
+            {
+                qDebug() << m_insertFileWcs.lastError();
+                return false;
+            }
+            last_id = m_insertFileWcs.lastInsertId().toLongLong();
         }
-        last_id = m_insertFile.lastInsertId().toLongLong();
+        else
+        {
+            m_insertFile.bindValue(0, filePath);
+            m_insertFile.bindValue(1, mtime);
+            if(!m_insertFile.exec())
+            {
+                qDebug() << m_insertFile.lastError();
+                return false;
+            }
+            last_id = m_insertFile.lastInsertId().toLongLong();
+        }
+
         QVariantList file_id, keys, values, comments;
         for(auto &record : info.fitsHeader)
         {
diff --git a/database.h b/database.h
index 3ea81e5..f85a53a 100644
--- a/database.h
+++ b/database.h
@@ -15,6 +15,7 @@ class Database : public QObject
     QSqlQuery m_isMarkedQuery;
 
     QSqlQuery m_insertFile;
+    QSqlQuery m_insertFileWcs;
     QSqlQuery m_insertFitsHeader;
     QSqlQuery m_checkFile;
     QSqlQuery m_headerKeywords;
@@ -39,6 +40,7 @@ protected:
     bool indexDir2(const QDir &dir, QProgressDialog *progress);
     bool indexFile(const QFileInfo &file);
     bool checkError(QSqlQuery &query);
+    int checkVersion();
 };
 
 #endif // DATABASE_H
diff --git a/imageinfo.cpp b/imageinfo.cpp
index 5a3a159..e816eac 100644
--- a/imageinfo.cpp
+++ b/imageinfo.cpp
@@ -58,7 +58,9 @@ void WCSData::freeWCS()
     wcs = nullptr;
 }
 
-WCSData::WCSData(char *header, int nrec)
+WCSData::WCSData(int width, int height, char *header, int nrec) :
+    width(width),
+    height(height)
 {
     int stat[NWCSFIX];
     int nreject = 0;
@@ -117,7 +119,7 @@ bool WCSData::worldToPixel(const SkyPoint &point, QPointF &pixel) const
     return false;
 }
 
-void WCSData::calculateBounds(int w, int h, double &minRa, double &maxRa, double &minDec, double &maxDec)
+void WCSData::calculateBounds(double &minRa, double &maxRa, double &minDec, double &maxDec) const
 {
     if(wcs == nullptr)return;
 
@@ -136,21 +138,21 @@ void WCSData::calculateBounds(int w, int h, double &minRa, double &maxRa, double
         maxDec = std::max(maxDec, point.DEC());
     };
 
-    for(int x=0; x<w; x++)
+    for(int x=0; x<width; x++)
     {
         update(QPointF(x, 0));
-        update(QPointF(x, h - 1));
+        update(QPointF(x, height - 1));
     }
 
-    for(int y=0; y<h; y++)
+    for(int y=0; y<height; y++)
     {
         update(QPointF(0, y));
-        update(QPointF(w - 1, y));
+        update(QPointF(width - 1, y));
     }
 
     QPointF ncp;
     QPointF scp;
-    QRectF s(0, 0, w - 1, h - 1);
+    QRectF s(0, 0, width - 1, height - 1);
     if(worldToPixel(SkyPoint(0, 90), ncp))
     {
         if(s.contains(ncp))
diff --git a/imageinfo.h b/imageinfo.h
index 4199631..39f6d87 100644
--- a/imageinfo.h
+++ b/imageinfo.h
@@ -30,14 +30,16 @@ class WCSData
 {
     int nwcs = 0;
     struct wcsprm *wcs = nullptr;
+    int width;
+    int height;
     void freeWCS();
 public:
-    WCSData();
-    WCSData(char *header, int nrec);
+    WCSData(int width, int height, char *header, int nrec);
+    WCSData(const WCSData &) = delete;
     ~WCSData();
     bool pixelToWorld(const QPointF &pixel, SkyPoint &point) const;
     bool worldToPixel(const SkyPoint &point, QPointF &pixel) const;
-    void calculateBounds(int w, int h, double &minRa, double &maxRa, double &minDec, double &maxDec);
+    void calculateBounds(double &minRa, double &maxRa, double &minDec, double &maxDec) const;
     bool valid() const { return wcs; };
 };
 
diff --git a/loadrunable.cpp b/loadrunable.cpp
index c65a39d..db14c8c 100644
--- a/loadrunable.cpp
+++ b/loadrunable.cpp
@@ -132,6 +132,9 @@ bool loadRAW(const QString path, ImageInfoData &info, RawImage **image)
 
 int loadFITSHeader(fitsfile *file, ImageInfoData &info)
 {
+    int imgtype;
+    int naxis;
+    long naxes[3] = {0};
     int nexist;
     int status = 0;
     char key[FLEN_KEYWORD];
@@ -139,6 +142,7 @@ int loadFITSHeader(fitsfile *file, ImageInfoData &info)
     char comm[FLEN_COMMENT];
     char strval[FLEN_VALUE];
     QVariant var;
+    fits_get_img_param(file, 3, &imgtype, &naxis, naxes, &status);
     fits_get_hdrspace(file, &nexist, nullptr, &status);
     for(int i=1; i<=nexist; i++)
     {
@@ -173,7 +177,7 @@ int loadFITSHeader(fitsfile *file, ImageInfoData &info)
     fits_hdr2str(file, TRUE, nullptr, 0, &header, &nrec, &status);
     if(status == 0)
     {
-        info.wcs = std::make_shared<WCSData>(header, nrec);
+        info.wcs = std::make_shared<WCSData>(naxes[0], naxes[1], header, nrec);
         if(!info.wcs->valid())info.wcs.reset();
     }
     fits_free_memory(header, &status);