diff --git a/gmtxy-image.sh b/gmtxy-image.sh
index 126ac43..9e80eac 100755
--- a/gmtxy-image.sh
+++ b/gmtxy-image.sh
@@ -12,8 +12,10 @@ overwriteRange='null'
 overwrite=0
 labels=("x (m)" "y (m)")
 plotgrad=0
+axistick=("a" "a") #横纵坐标轴间隔 a表示自动
+bartick="a" #色标轴标轴间隔 a表示自动
 # 从命令行获取参数
-while getopts "hi:r:u:c:a:G:g" arg
+while getopts "hi:r:u:c:a:G:t:v:g" arg
 do
 	case $arg in
 		h)
@@ -24,6 +26,8 @@ For futher explanations, please look for GMT's manuscripts.\nAuthor: Yi Zhang (z
 			printf "%s\t%s\n" "-r" "data range. The template will ditect the input data range automaticly, the use of this option will overwrite the range."
 			printf "%s\t%s\n" "-u" "data unit. The default is meter."
 			printf "%s\t%s\n" "-c" "color cpt. The default is rainbow."
+			printf "%s\t%s\n" "-t" "intervals of axis's labels. the script will set the intervals automatically if -t option is not set."
+			printf "%s\t%s\n" "-v" "intervals of color bar's labels. the script will set the intervals automatically if -v option is not set."
 			printf "%s\t%s\n" "-a" "axis labels. The deafults are x (m) and y (m)."
 			printf "%s\t%s\n" "-g" "use grdgradient. The default is false."
 			printf "%s\t%s\n" "-G" "provide a different input grid data for the use of grdgradient. This should be used with the '-g' option at the same time"
@@ -34,6 +38,10 @@ For futher explanations, please look for GMT's manuscripts.\nAuthor: Yi Zhang (z
 			unit=$OPTARG;;
 		c)
 			color=$OPTARG;;
+		t)
+			axistick=(${OPTARG//,/ });;
+		v)
+			bartick=$OPTARG;;
 		r)
 			overwrite=1
 			overwriteRange=$OPTARG;;
@@ -67,12 +75,13 @@ else
 	gmt gmtset \
 	FONT_ANNOT_PRIMARY=7p,Times-Roman,black \
 	MAP_FRAME_PEN=thin,black \
-	MAP_TICK_LENGTH_PRIMARY=2p/1p \
+	MAP_TICK_LENGTH_PRIMARY=1p/0.5p \
 	MAP_TITLE_OFFSET=7p \
-	MAP_GRID_CROSS_SIZE_PRIMARY=4p \
+	MAP_GRID_CROSS_SIZE_PRIMARY=2p \
 	FONT_LABEL=7p,Times-Roman,black \
 	MAP_FRAME_AXES=WeSnZ \
-	MAP_LABEL_OFFSET=4p
+	MAP_LABEL_OFFSET=2p \
+	MAP_ANNOT_OFFSET_PRIMARY=2.5p
 
 	gmt grd2cpt ${data} -C${color} -R${range} -Z -D > $cptfile
 	if [[ $plotgrad == 1 ]]; then
@@ -82,11 +91,18 @@ else
 		else
 			gmt grdgradient ${gridData} -G${gradfile} -Nt -A0/45
 		fi
-		gmt grdimage ${data} -R${range} -C${cptfile} -I${gradfile} -Bxag+l"${labels[0]}" -Byag+l"${labels[1]}" -JX3i -K -P > $psfile
+		gmt grdimage ${data} -R${range} -C${cptfile} -I${gradfile} -Bx${axistick[0]}g+l"${labels[0]}" -By${axistick[1]}g+l"${labels[1]}" -JX1.5i -K -P > $psfile
 	else
-		gmt grdimage ${data} -R${range} -C${cptfile} -Bxag+l"${labels[0]}" -Byag+l"${labels[1]}" -JX3i -K -P > $psfile
+		gmt grdimage ${data} -R${range} -C${cptfile} -Bx${axistick[0]}g+l"${labels[0]}" -By${axistick[1]}g+l"${labels[1]}" -JX1.5i -K -P > $psfile
+	fi
+
+	#-C${cptfile}+Uk 使用km（色标单位除1000
+	#如果unit等于km则在cptfile后面添加+Uk
+	if [[ ${unit} == 'km+Uk' ]]; then
+		gmt psscale -Dx1.6i/0.1i+w1.2i/0.07i -C${cptfile}+Uk -Bx${bartick} -By+l${unit} -O >> $psfile
+	else
+		gmt psscale -Dx1.6i/0.1i+w1.2i/0.07i -C${cptfile} -Bx${bartick} -By+l${unit} -O >> $psfile
 	fi
-	gmt psscale -Dx3.2i/0.3i+w2.2i/0.1i -C${cptfile} -Bxa -By+l${unit} -O >> $psfile
 	gmt psconvert $psfile -A -TEG -E300
 	# 删除临时文件 使用linux终端rm命令
 	rm $cptfile $psfile gmt.history gmt.conf