I am trying the keyword digital terrain models,digital elevation modeling, linking to http://www.sblgis.com/gis-digital-elevation.aspx for two month, but it is not coming up to first page. Can anybody suggest ideas for promoting these keywords to first page.
Now for getting good ranking, you have to get the backlink by directory submission, article submission and press release.
You Must be do some bookmarking for your sites on top bookmarking sites that brings your site to good ranking ......and also do high pr directory submission for your site
While doing directory submission and article submission don't forget to place your keyword in anchor text. This will helps you a lot to obtain good ranking.
You need to do proper work on these keywords which you targeted. take link form Directory submissions, article submissions, link building, forum posting, social bookmarking and do follow blog commenting, it will help to bring your keywords on top. and Need to check your website pages Meta tags too.
best thing to do will be to write articles and submit and them and other one is forum posts signature which you are already started so you should be ok in a few months time.
If you want to get good ranking in keywords related to your business, you have to generate the backlinks by article submission, directory submission and blog posting and press releases. With best wishes.
I would spend some time on your content. With out spending some real time on this I can't see any big problems... Two month is not a very long time by the way