Set scale to be 5 for bc lat/lon converisons
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00e09e6897
commit
6cbd8670c5
1 changed files with 12 additions and 8 deletions
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@ -11,6 +11,7 @@ CPI=3.14159265358979323846
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lat2px() {
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DEGREES="$1"; ZOOM="$2"
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echo "
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scale=5;
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define atanh(x) { return((l(1 + x) - l(1 - x))/2) };
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-( \
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atanh(s(($DEGREES * $CPI / 180))) * \
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@ -21,15 +22,17 @@ lat2px() {
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lon2px() {
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DEGREES="$1"; ZOOM="$2"
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echo "
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( \
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($DEGREES * $CPI / 180) * $CTILESIZE * \
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e($ZOOM * $CLN2) / (2 * $CPI) \
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) + (e($ZOOM * $CLN2) * ($CTILESIZE / 2))
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scale=5;
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( \
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($DEGREES * $CPI / 180) * $CTILESIZE * \
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e($ZOOM * $CLN2) / (2 * $CPI) \
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) + (e($ZOOM * $CLN2) * ($CTILESIZE / 2))
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" | bc -l
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}
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px2lat() {
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PX="$1"; ZOOM="$2"
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echo "
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scale=5;
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define asin(x) {
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if(x==1) return($CPI/2); if(x==-1) return(-$CPI/2); return(a(x/sqrt(1-(x^2))));
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}
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@ -43,10 +46,11 @@ px2lat() {
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px2lon() {
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PX="$1"; ZOOM="$2"
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echo "
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( \
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($PX - (e($ZOOM * $CLN2) * ($CTILESIZE / 2))) * 2 * $CPI / \
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($CTILESIZE * e($ZOOM * $CLN2)) \
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) / $CPI * 180
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scale=5;
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( \
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($PX - (e($ZOOM * $CLN2) * ($CTILESIZE / 2))) * 2 * $CPI / \
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($CTILESIZE * e($ZOOM * $CLN2)) \
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) / $CPI * 180
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" | bc -l
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}
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